US StockDetailed Quotes

Provided by Tiger Trade Technology Pte. Ltd.

Natural Gas

34.77

-0.7200-2.03%

Volume:131.05K

Turnover:4.57M

Market Cap:447.71M

PE:21.73

High:35.45

Open:35.45

Low:34.53

Close:35.49

52wk High:44.61

52wk Low:25.05

Shares:12.88M

Float Shares:12.48M

Volume Ratio:0.75

T/O Rate:1.05%

Dividend:0.47

Dividend Rate:1.35%

EPS(TTM):1.60

EPS(LYR):1.57

ROE:7.30%

ROA:4.39%

PB:1.52

PE(LYR):22.15

Loading ...

Overview Company News Filings

Quarterly Report

Quarterly report [Sections 13 or 15(d)]

Major Issues Report

Current report, items 2.02 and 9.01

Major Issues Report

8-K - Current report

Major Issues Report

8-K - Current report

Major Issues Report

Current report, items 2.03 and 8.01

Major Issues Report

Current report, items 2.02 and 9.01

Annual Report

Annual report [Section 13 and 15(d), not S-K Item 405]

Beneficial Ownership Change

Statement of acquisition of beneficial ownership by individuals

Beneficial Ownership Change

Statement of acquisition of beneficial ownership by individuals

Beneficial Ownership Change

[Amend] Statement of acquisition of beneficial ownership by individuals

Beneficial Ownership Change

Statement of acquisition of beneficial ownership by individuals

Beneficial Ownership Change

[Amend] Statement of acquisition of beneficial ownership by individuals

Beneficial Ownership Change

[Amend] Statement of acquisition of beneficial ownership by individuals

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Major Issues Report

Current report, items 2.02 and 9.01

Quarterly Report

Quarterly report [Sections 13 or 15(d)]

Major Issues Report

Current report, item 5.02

Statement Of Changes In Beneficial Ownership

Statement of changes in beneficial ownership of securities

Beneficial Ownership Change

[Amend] Statement of acquisition of beneficial ownership by individuals

Major Issues Report

Current report, items 2.02 and 9.01

{"basename":"","ssrTDKData":{"titleTemplate":"%s - Tiger Brokers","title":"Tiger Brokers | Global Stocks, Options & Futures Trading App","description":"Tiger Brokers, one-stop investment in US stocks, SGX stocks, HK stocks, A-shares & other global assets. One of the best stock trading platforms in Singapore.","keywords":"tiger brokers,tiger trade,tiger brokers singapore,broker online,stock trading in singapore,share trading singapore,brokerage firm singapore,trading app,stock broker singapore,stock trading platforms,trading account","social":{"ogDescription":"Tiger Brokers, one-stop investment in US stocks, SGX stocks, HK stocks, A-shares & other global assets. One of the best stock trading platforms in Singapore.","ogImage":"https://c1.itigergrowtha.com/portal5/static/media/og-logo.0a0bd8dc.png","ogUrl":"https://www.etasphere.com/stock/NGS/filings?page=10"},"companyName":"Tiger Brokers"},"pageData":{"isMobile":false,"isTiger":false,"isTTM":true,"region":"SGP","license":"TBSG","edition":"fundamental","symbol":"NGS","isAnalysisPage":false},"__swrFallback__":{"@#url:\"https://hq.skytigris.cn/stock_info/detail/global\",params:#delay:false,,method:\"POST\",data:#items:@#symbol:\"NGS\",,,,,undefined,":{"symbol":"NGS","market":"US","secType":"STK","nameCN":"Natural Gas","latestPrice":34.77,"timestamp":1787601600000,"preClose":35.49,"halted":0,"volume":131054,"delay":0,"changeRate":-0.020287404902789484,"floatShares":12481581,"shares":12876400,"eps":1.600244,"marketStatus":"Pre-Mkt","change":-0.72,"latestTime":"08-25 05:21:58 EDT","open":35.45,"high":35.45,"low":34.5301,"amount":4567737.76844,"amplitude":0.02592,"askPrice":45.8,"askSize":100,"bidPrice":34.33,"bidSize":1,"shortable":3,"etf":0,"ttmEps":1.600244,"tradingStatus":1,"nextMarketStatus":{"tag":"Open","tradingStatus":2,"beginTime":1787664600000},"marketStatusCode":1,"adr":0,"adrRate":0,"listingDate":1035172800000,"exchange":"NYSE","adjPreClose":34.77,"dividendRate":0.013517,"postHourTrading":{"tag":"盘后","latestPrice":34.77,"preClose":34.77,"latestTime":"19:30 EDT","volume":42683,"amount":1484087.91,"timestamp":1787614206021,"change":0,"changeRate":0,"amplitude":0},"volumeRatio":0.7514029966620955,"impliedVol":0.451,"impliedVolPercentile":0.948},"@#url:\"https://hq.skytigris.cn/stock_info/fundamental/all\",params:#delay:false,,method:\"POST\",data:#items:@#symbol:\"NGS\",,,,,undefined,":{"symbol":"NGS","floatShares":12481581,"roa":"4.39%","roe":"7.30%","lyrEps":1.57,"volumeRatio":0.7514029966620955,"shares":12876400,"dividePrice":0.47,"high":35.45,"amplitude":0.02592,"preClose":35.49,"low":34.5301,"week52Low":25.05,"pbRate":"1.52","psRate":"2.36","week52High":44.605,"institutionHeld":0.7835,"latestPrice":34.77,"committee":-0.980198,"eps":1.600244,"divideRate":0.013517,"volume":131054,"delay":0,"ttmEps":1.600244,"open":35.45,"prevYearClose":33.65,"prevWeekClose":35.49,"prevMonthClose":36.64,"prevQuarterClose":43.14,"fiveDayClose":38.26,"twentyDayClose":36.4,"sixtyDayClose":41.25,"dividendPayoutRate":0.1321246652841813,"dividendFrequency":"Q","dividendGrowthYears":0,"fiveYearAvgDividendRate":0.00617828773168579},"@#url:\"https://hq.skytigris.cn/fundamental/corporate_actions/details/NGS\",params:#limit:5,,,undefined,":[{"date":"2026-08-19","symbol":"NGS","amount":0.15,"announcedDate":"2026-08-10","type":"dividend","lastAmount":null,"market":"US","newRecordDate":"2026-08-19","defaultRemindTime":1787146200000,"name":"Natural Gas Services Group Inc","lastCurrency":null,"lastExecuteDate":null,"recordDate":"2026-09-02","payableDate":"2026-08-19","currency":"USD","dateTimestamp":1787112000000,"payDate":"2026-09-02"},{"market":"US","date":"2026-08-10","symbol":"NGS","fiscalQuarterEnding":"2026/06","expectedEps":0.37,"name":null,"time":"Post-Mkt","type":"earning","dateTimestamp":1786334400000,"reportTimeType":"post","actualEps":0.47},{"date":"2026-05-20","symbol":"NGS","amount":0.15,"announcedDate":"2026-05-11","type":"dividend","lastAmount":null,"market":"US","newRecordDate":"2026-05-20","defaultRemindTime":1779283800000,"name":"Natural Gas Services Group Inc","lastCurrency":null,"lastExecuteDate":null,"recordDate":"2026-06-03","payableDate":"2026-05-20","currency":"USD","dateTimestamp":1779249600000,"payDate":"2026-06-03"},{"market":"US","date":"2026-05-11","symbol":"NGS","fiscalQuarterEnding":"2026/03","expectedEps":0.45,"name":null,"time":"Post-Mkt","type":"earning","dateTimestamp":1778472000000,"reportTimeType":"post","actualEps":0.53},{"market":"US","date":"2026-03-16","symbol":"NGS","fiscalQuarterEnding":"2025/12","expectedEps":0.37,"name":null,"time":"Post-Mkt","type":"earning","dateTimestamp":1773633600000,"reportTimeType":"post","actualEps":0.32}],"@#url:\"https://hq.skytigris.cn/fundamental/dividend/history\",params:#symbol:\"NGS\",market:\"US\",,,undefined,":[{"executeDate":"2025-08-08","recordDate":"2025-08-08","paymentDate":"2025-08-22","value":0.1,"currency":"USD"},{"executeDate":"2025-11-20","recordDate":"2025-11-20","paymentDate":"2025-12-03","value":0.11,"currency":"USD"},{"executeDate":"2026-02-18","recordDate":"2026-02-18","paymentDate":"2026-03-04","value":0.11,"currency":"USD"},{"executeDate":"2026-05-20","recordDate":"2026-05-20","paymentDate":"2026-06-03","value":0.15,"currency":"USD"},{"executeDate":"2026-08-19","recordDate":"2026-08-19","paymentDate":"2026-09-02","value":0.15,"currency":"USD"}],"@#url:\"https://hq.skytigris.cn/fundamental/estimate/recommendation\",params:#symbol:\"NGS\",market:\"US\",delay:false,,,undefined,":{},"@#url:\"https://hq.skytigris.cn/value_analysis/stock/NGS\",params:#withQuantilePoint:true,period:\"5year\",factor:\"peRate\",delay:false,algorithm:1,,,undefined,":{"brief":{"id":"NGS","date":"2026-08-21","current":21.727936,"percent":0.672052,"low":-256.562625,"twenty":-25.319648,"median":18.525476,"eighty":25.418922,"high":4916.003289,"avg":203.521322,"sd":923.372172,"marketCap":458147083},"quantilePoints":[{"date":"2021-08-27","current":-26.790874,"twenty":-12.741662,"median":14.35157,"eighty":37.737248,"marketCap":127310231},{"date":"2021-09-03","current":-26.678543,"twenty":-13.103078,"median":14.285128,"eighty":37.730006,"marketCap":126776436},{"date":"2021-09-10","current":-27.998429,"twenty":-13.853437,"median":14.185464,"eighty":37.730006,"marketCap":133048533},{"date":"2021-09-17","current":-26.875122,"twenty":-26.442648,"median":14.119022,"eighty":37.730006,"marketCap":127710578},{"date":"2021-09-24","current":-26.201137,"twenty":-26.802107,"median":13.961896,"eighty":37.730006,"marketCap":124507805},{"date":"2021-10-01","current":-29.739555,"twenty":-26.847039,"median":13.901075,"eighty":37.730006,"marketCap":141322363},{"date":"2021-10-08","current":-34.067857,"twenty":-27.015535,"median":13.799706,"eighty":37.730006,"marketCap":161890457},{"date":"2021-10-15","current":-34.816906,"twenty":-27.610888,"median":13.627348,"eighty":37.730006,"marketCap":165449938},{"date":"2021-10-22","current":-31.376829,"twenty":-28.048977,"median":13.463168,"eighty":37.730006,"marketCap":149102693},{"date":"2021-10-29","current":-31.543285,"twenty":-28.178135,"median":13.252313,"eighty":37.730006,"marketCap":149893688},{"date":"2021-11-05","current":-34.511738,"twenty":-31.443411,"median":12.936346,"eighty":37.730006,"marketCap":163999779},{"date":"2021-11-12","current":-28.323181,"twenty":-31.809613,"median":12.81675,"eighty":37.730006,"marketCap":154248045},{"date":"2021-11-19","current":-26.048708,"twenty":-31.809613,"median":12.67113,"eighty":37.730006,"marketCap":141861262},{"date":"2021-11-26","current":-27.197915,"twenty":-31.809613,"median":12.617422,"eighty":37.730006,"marketCap":148119847},{"date":"2021-12-03","current":-24.684024,"twenty":-31.809613,"median":12.50894,"eighty":37.730006,"marketCap":134429192},{"date":"2021-12-10","current":-24.779791,"twenty":-31.809613,"median":12.421087,"eighty":37.687226,"marketCap":134950741},{"date":"2021-12-17","current":-23.965769,"twenty":-31.809613,"median":12.360265,"eighty":37.648411,"marketCap":130517577},{"date":"2021-12-23","current":-25.378337,"twenty":-31.809613,"median":12.333233,"eighty":37.609634,"marketCap":138210421},{"date":"2021-12-31","current":-25.067093,"twenty":-31.809613,"median":12.272412,"eighty":37.543382,"marketCap":136515387},{"date":"2022-01-07","current":-25.881115,"twenty":-31.787419,"median":12.138372,"eighty":37.480006,"marketCap":140948552},{"date":"2022-01-14","current":-27.269741,"twenty":-31.787419,"median":12.096706,"eighty":37.480006,"marketCap":148511009},{"date":"2022-01-21","current":-24.564314,"twenty":-31.787419,"median":12.0494,"eighty":37.480006,"marketCap":133777256},{"date":"2022-01-28","current":-25.569871,"twenty":-31.787419,"median":11.991958,"eighty":37.480006,"marketCap":139253518},{"date":"2022-02-04","current":-27.078206,"twenty":-31.787419,"median":11.826389,"eighty":37.480006,"marketCap":147467911},{"date":"2022-02-11","current":-27.580985,"twenty":-31.787419,"median":11.485112,"eighty":37.480006,"marketCap":150206042},{"date":"2022-02-18","current":-28.011938,"twenty":-31.787419,"median":11.29589,"eighty":37.480006,"marketCap":152553012},{"date":"2022-02-25","current":-29.544214,"twenty":-31.787419,"median":11.133699,"eighty":37.480006,"marketCap":160897792},{"date":"2022-03-04","current":-30.14276,"twenty":-31.881744,"median":10.532243,"eighty":37.480006,"marketCap":164157472},{"date":"2022-03-11","current":-30.046993,"twenty":-31.881744,"median":-4.119645,"eighty":37.480006,"marketCap":163635923},{"date":"2022-03-18","current":-15.427724,"twenty":-31.881744,"median":-4.318331,"eighty":37.480006,"marketCap":141672794},{"date":"2022-03-25","current":-17.560462,"twenty":-31.881744,"median":-4.629788,"eighty":37.480006,"marketCap":161257722},{"date":"2022-04-01","current":-16.341755,"twenty":-31.881744,"median":-4.822481,"eighty":37.480006,"marketCap":150066334},{"date":"2022-04-08","current":-16.411,"twenty":-31.881744,"median":-5.183933,"eighty":37.480006,"marketCap":150702209},{"date":"2022-04-14","current":-18.751471,"twenty":-31.881744,"median":-5.307647,"eighty":37.480006,"marketCap":172194760},{"date":"2022-04-22","current":-18.059024,"twenty":-31.881744,"median":-5.395181,"eighty":37.480006,"marketCap":165836017},{"date":"2022-04-29","current":-17.006504,"twenty":-31.881744,"median":-6.229586,"eighty":37.480006,"marketCap":156170728},{"date":"2022-05-06","current":-17.034202,"twenty":-31.881744,"median":-7.732276,"eighty":37.344582,"marketCap":156425077},{"date":"2022-05-13","current":-16.521791,"twenty":-31.881744,"median":-7.991191,"eighty":37.158672,"marketCap":151719607},{"date":"2022-05-20","current":-18.452669,"twenty":-31.881744,"median":-8.222801,"eighty":36.80071,"marketCap":155961962},{"date":"2022-05-27","current":-20.593179,"twenty":-31.881744,"median":-8.345427,"eighty":36.320704,"marketCap":174053550},{"date":"2022-06-03","current":-21.803674,"twenty":-31.881744,"median":-8.440783,"eighty":36.0474,"marketCap":184284654},{"date":"2022-06-10","current":-20.799849,"twenty":-31.881744,"median":-8.556638,"eighty":35.889171,"marketCap":175800324},{"date":"2022-06-17","current":-18.93982,"twenty":-31.881744,"median":-8.686057,"eighty":35.745327,"marketCap":160079358},{"date":"2022-06-24","current":-17.566941,"twenty":-31.887292,"median":-8.733766,"eighty":35.745327,"marketCap":148475788},{"date":"2022-07-01","current":-15.647864,"twenty":-31.887292,"median":-8.856393,"eighty":35.486407,"marketCap":132255744},{"date":"2022-07-08","current":-14.688325,"twenty":-31.887292,"median":-8.951769,"eighty":35.371332,"marketCap":124145722},{"date":"2022-07-15","current":-14.688325,"twenty":-31.887292,"median":-9.128897,"eighty":33.715796,"marketCap":124145722},{"date":"2022-07-22","current":-14.79166,"twenty":-31.887292,"median":-9.181358,"eighty":33.205764,"marketCap":125019109},{"date":"2022-07-29","current":-14.835946,"twenty":-31.887292,"median":-9.251524,"eighty":32.776264,"marketCap":125393417},{"date":"2022-08-05","current":-14.58499,"twenty":-31.887292,"median":-9.510403,"eighty":32.212544,"marketCap":123272335},{"date":"2022-08-12","current":-14.821184,"twenty":-31.887292,"median":-9.695353,"eighty":31.729356,"marketCap":125268648},{"date":"2022-08-19","current":-19.552796,"twenty":-31.887292,"median":-9.957389,"eighty":31.460918,"marketCap":129107109},{"date":"2022-08-26","current":-21.924529,"twenty":-31.887292,"median":-10.380679,"eighty":31.232746,"marketCap":144767665},{"date":"2022-09-02","current":-19.851597,"twenty":-31.887292,"median":-10.532245,"eighty":17.341066,"marketCap":131080092},{"date":"2022-09-09","current":-19.048569,"twenty":-31.887292,"median":-10.652794,"eighty":17.216549,"marketCap":125777699},{"date":"2022-09-16","current":-19.197969,"twenty":-31.887292,"median":-10.818271,"eighty":16.954202,"marketCap":126764191},{"date":"2022-09-23","current":-18.899168,"twenty":-31.887292,"median":-10.898506,"eighty":16.659061,"marketCap":124791207},{"date":"2022-09-30","current":-18.749768,"twenty":-31.887292,"median":-10.955144,"eighty":16.54085,"marketCap":123804715},{"date":"2022-10-07","current":-20.000997,"twenty":-31.887292,"median":-11.03223,"eighty":16.403272,"marketCap":132066584},{"date":"2022-10-14","current":-18.675067,"twenty":-31.887292,"median":-11.099092,"eighty":16.101573,"marketCap":123311470},{"date":"2022-10-21","current":-19.31002,"twenty":-31.887292,"median":-11.192699,"eighty":16.003192,"marketCap":127504059},{"date":"2022-10-28","current":-20.635949,"twenty":-31.887292,"median":-11.247415,"eighty":15.842139,"marketCap":136259174},{"date":"2022-11-04","current":-20.635949,"twenty":-31.887292,"median":-11.267572,"eighty":15.807513,"marketCap":136259174},{"date":"2022-11-11","current":-22.055255,"twenty":-31.887292,"median":-11.286306,"eighty":15.736525,"marketCap":145630846},{"date":"2022-11-18","current":-23.465315,"twenty":-31.887292,"median":-11.328042,"eighty":15.65657,"marketCap":127346266},{"date":"2022-11-25","current":-25.365434,"twenty":-31.887292,"median":-11.428825,"eighty":15.578104,"marketCap":137658208},{"date":"2022-12-02","current":-25.18229,"twenty":-31.887292,"median":-11.499373,"eighty":15.386829,"marketCap":136664286},{"date":"2022-12-09","current":-25.479898,"twenty":-31.887292,"median":-11.607243,"eighty":15.281063,"marketCap":138279409},{"date":"2022-12-16","current":-25.8004,"twenty":-31.887292,"median":-11.670705,"eighty":15.162248,"marketCap":140018773},{"date":"2022-12-23","current":-25.388327,"twenty":-31.887292,"median":-11.791645,"eighty":14.951019,"marketCap":137782448},{"date":"2022-12-30","current":-26.235367,"twenty":-31.887292,"median":-11.823169,"eighty":14.918014,"marketCap":142379337},{"date":"2023-01-06","current":-27.128194,"twenty":-31.887292,"median":-11.932742,"eighty":14.785997,"marketCap":147224708},{"date":"2023-01-13","current":-28.547559,"twenty":-31.887292,"median":-12.023447,"eighty":14.719988,"marketCap":154927604},{"date":"2023-01-20","current":-26.120902,"twenty":-31.887292,"median":-12.063912,"eighty":14.685063,"marketCap":141758136},{"date":"2023-01-27","current":-26.990836,"twenty":-31.887292,"median":-12.194778,"eighty":14.620974,"marketCap":146479266},{"date":"2023-02-03","current":-25.228076,"twenty":-31.887292,"median":-12.335875,"eighty":14.58797,"marketCap":136912766},{"date":"2023-02-10","current":-25.502791,"twenty":-31.887292,"median":-12.406423,"eighty":14.552525,"marketCap":138403649},{"date":"2023-02-17","current":-24.793109,"twenty":-31.887292,"median":-12.503194,"eighty":14.500444,"marketCap":134552201},{"date":"2023-02-24","current":-25.113611,"twenty":-31.887292,"median":-12.678538,"eighty":14.467353,"marketCap":136291565},{"date":"2023-03-03","current":-25.365434,"twenty":-31.887292,"median":-12.917738,"eighty":14.298416,"marketCap":137658208},{"date":"2023-03-10","current":-24.220784,"twenty":-31.887292,"median":-13.749115,"eighty":14.185464,"marketCap":131446195},{"date":"2023-03-17","current":-21.954378,"twenty":-31.887292,"median":-14.201174,"eighty":14.135349,"marketCap":119146409},{"date":"2023-03-24","current":-22.480917,"twenty":-31.887292,"median":-14.540704,"eighty":14.019358,"marketCap":122003935},{"date":"2023-03-31","current":-23.602673,"twenty":-31.881744,"median":-14.636657,"eighty":13.926338,"marketCap":128091708},{"date":"2023-04-06","current":-226.645675,"twenty":-32.203558,"median":-14.688325,"eighty":13.869988,"marketCap":128961389},{"date":"2023-04-14","current":-239.091536,"twenty":-32.708472,"median":-14.747373,"eighty":13.71861,"marketCap":136043084},{"date":"2023-04-21","current":-236.482789,"twenty":-33.318808,"median":-14.887614,"eighty":13.607415,"marketCap":134558707},{"date":"2023-04-28","current":-226.419691,"twenty":-34.445156,"median":-15.618339,"eighty":13.392255,"marketCap":128832804},{"date":"2023-05-02","current":-228.468188,"twenty":-34.545029,"median":-15.647864,"eighty":13.313134,"marketCap":129998399},{"date":"2023-05-12","current":-220.830761,"twenty":-35.205302,"median":-16.092474,"eighty":12.916413,"marketCap":125652703},{"date":"2023-05-19","current":-243.501254,"twenty":-47.03649,"median":-16.341755,"eighty":12.803461,"marketCap":130516672},{"date":"2023-05-26","current":-239.069718,"twenty":-48.291477,"median":-16.431773,"eighty":12.660056,"marketCap":128141369},{"date":"2023-06-02","current":-228.573974,"twenty":-49.474014,"median":-16.501017,"eighty":12.612107,"marketCap":122515650},{"date":"2023-06-09","current":-240.935629,"twenty":-50.974903,"median":-16.757223,"eighty":12.50894,"marketCap":129141497},{"date":"2023-06-16","current":-229.740168,"twenty":-51.87278,"median":-17.020353,"eighty":12.415681,"marketCap":123140730},{"date":"2023-06-23","current":-227.641019,"twenty":-52.178874,"median":-17.311181,"eighty":12.35621,"marketCap":122015586},{"date":"2023-06-30","current":-230.673123,"twenty":-52.638015,"median":-17.782926,"eighty":12.296741,"marketCap":123640794},{"date":"2023-07-07","current":-228.340735,"twenty":-53.352236,"median":-18.086722,"eighty":12.269558,"marketCap":122390634},{"date":"2023-07-14","current":-232.072556,"twenty":-53.903206,"median":-18.492192,"eighty":12.111564,"marketCap":124390890},{"date":"2023-07-21","current":-235.337897,"twenty":-54.719457,"median":-18.675067,"eighty":12.096706,"marketCap":126141113},{"date":"2023-07-28","current":-247.932791,"twenty":-54.872504,"median":-18.750619,"eighty":12.016488,"marketCap":132891976},{"date":"2023-08-04","current":-240.70239,"twenty":-55.760177,"median":-18.833806,"eighty":11.927757,"marketCap":129016481},{"date":"2023-08-11","current":-236.270853,"twenty":-57.06618,"median":-18.930788,"eighty":11.74363,"marketCap":126641177},{"date":"2023-08-18","current":3452.985,"twenty":-57.321259,"median":-18.936518,"eighty":11.692581,"marketCap":131213430},{"date":"2023-08-25","current":3502.079579,"twenty":-57.321259,"median":-18.936518,"eighty":11.692581,"marketCap":133079024},{"date":"2023-09-01","current":3554.447132,"twenty":-57.321259,"median":-18.936518,"eighty":11.692581,"marketCap":135068991},{"date":"2023-09-08","current":3613.360605,"twenty":-57.321259,"median":-18.936518,"eighty":11.692581,"marketCap":137307703},{"date":"2023-09-15","current":3727.914605,"twenty":-57.321259,"median":-18.936518,"eighty":11.692581,"marketCap":141660755},{"date":"2023-09-22","current":3960.295605,"twenty":-57.321259,"median":-18.936518,"eighty":11.692581,"marketCap":150491233},{"date":"2023-09-29","current":4866.908737,"twenty":-57.321259,"median":-18.936518,"eighty":11.692581,"marketCap":184942532},{"date":"2023-10-06","current":4254.863053,"twenty":-57.321259,"median":-18.936518,"eighty":11.692581,"marketCap":161684796},{"date":"2023-10-13","current":4660.711526,"twenty":-57.321259,"median":-18.936518,"eighty":11.692581,"marketCap":177107038},{"date":"2023-10-20","current":4880.000605,"twenty":-57.321259,"median":-18.936518,"eighty":11.692581,"marketCap":185440023},{"date":"2023-10-27","current":4519.973737,"twenty":-57.443696,"median":-18.93982,"eighty":11.483085,"marketCap":171759002},{"date":"2023-11-03","current":4817.814158,"twenty":-57.443696,"median":-18.93982,"eighty":11.483085,"marketCap":183076938},{"date":"2023-11-10","current":4680.349342,"twenty":-57.443696,"median":-18.93982,"eighty":11.483085,"marketCap":177853275},{"date":"2023-11-17","current":80.307197,"twenty":-57.443696,"median":-18.93982,"eighty":11.483085,"marketCap":183823175},{"date":"2023-11-24","current":85.088682,"twenty":-57.443696,"median":-18.93982,"eighty":11.483085,"marketCap":194767992},{"date":"2023-12-01","current":83.13262,"twenty":-57.443696,"median":-18.93982,"eighty":11.483085,"marketCap":190290567},{"date":"2023-12-08","current":72.156941,"twenty":-57.341665,"median":-18.938169,"eighty":11.488491,"marketCap":165167237},{"date":"2023-12-15","current":70.526889,"twenty":-57.341665,"median":-18.938169,"eighty":11.488491,"marketCap":161436050},{"date":"2023-12-22","current":79.437837,"twenty":-57.341665,"median":-18.938169,"eighty":11.785841,"marketCap":181833209},{"date":"2023-12-29","current":86.664398,"twenty":-57.443696,"median":-18.93982,"eighty":11.88721,"marketCap":198374807},{"date":"2024-01-05","current":83.78464,"twenty":-57.545728,"median":-18.954582,"eighty":11.915593,"marketCap":191783042},{"date":"2024-01-12","current":77.64478,"twenty":-57.545728,"median":-18.954582,"eighty":11.915593,"marketCap":177728902},{"date":"2024-01-19","current":77.373105,"twenty":-57.647759,"median":-18.969344,"eighty":11.992634,"marketCap":177107038},{"date":"2024-01-26","current":84.654001,"twenty":-57.545728,"median":-18.954582,"eighty":12.106167,"marketCap":193773009},{"date":"2024-02-02","current":80.687543,"twenty":-57.545728,"median":-18.954582,"eighty":12.284576,"marketCap":184693786},{"date":"2024-02-09","current":80.959218,"twenty":-57.545728,"median":-18.954582,"eighty":12.419735,"marketCap":185315650},{"date":"2024-02-16","current":82.91528,"twenty":-57.545728,"median":-18.954582,"eighty":12.583277,"marketCap":189793075},{"date":"2024-02-23","current":84.654001,"twenty":-57.545728,"median":-18.954582,"eighty":55.015272,"marketCap":193773009},{"date":"2024-03-01","current":90.902532,"twenty":-57.443696,"median":-18.93982,"eighty":58.347471,"marketCap":208075895},{"date":"2024-03-08","current":96.064361,"twenty":-57.443696,"median":-18.93982,"eighty":60.142778,"marketCap":219891322},{"date":"2024-03-15","current":96.390371,"twenty":-57.300852,"median":-18.936518,"eighty":62.169298,"marketCap":220637560},{"date":"2024-03-22","current":99.541804,"twenty":-55.831599,"median":-18.899168,"eighty":63.107754,"marketCap":227851189},{"date":"2024-03-28","current":107.36605,"twenty":-55.035754,"median":-18.792199,"eighty":63.951005,"marketCap":245760889},{"date":"2024-04-05","current":61.700672,"twenty":-54.780675,"median":-18.684404,"eighty":64.223021,"marketCap":292893092},{"date":"2024-04-12","current":61.281475,"twenty":-54.025643,"median":-18.516329,"eighty":64.223021,"marketCap":290903160},{"date":"2024-04-19","current":61.255275,"twenty":-53.535892,"median":-18.283848,"eighty":64.223021,"marketCap":290778790},{"date":"2024-04-26","current":63.325064,"twenty":-52.729843,"median":-17.862184,"eighty":64.141416,"marketCap":300604078},{"date":"2024-05-03","current":58.792488,"twenty":-52.158467,"median":-17.552179,"eighty":64.141416,"marketCap":279087940},{"date":"2024-05-10","current":61.595873,"twenty":-51.464654,"median":-17.034202,"eighty":64.141416,"marketCap":292395609},{"date":"2024-05-17","current":31.35849,"twenty":-50.883075,"median":-16.757223,"eighty":64.141416,"marketCap":297121697},{"date":"2024-05-24","current":28.759503,"twenty":-49.219963,"median":-16.507942,"eighty":64.141416,"marketCap":272496291},{"date":"2024-05-31","current":28.56261,"twenty":-47.740506,"median":-16.438697,"eighty":64.141416,"marketCap":270630730},{"date":"2024-06-07","current":26.370535,"twenty":-46.179425,"median":-16.341755,"eighty":64.141416,"marketCap":249860816},{"date":"2024-06-14","current":24.834769,"twenty":-34.866843,"median":-16.092474,"eighty":64.141416,"marketCap":235309440},{"date":"2024-06-21","current":24.821643,"twenty":-34.461801,"median":-15.718552,"eighty":64.223021,"marketCap":235185069},{"date":"2024-06-28","current":26.409913,"twenty":-33.268871,"median":-15.249932,"eighty":64.223021,"marketCap":250233928},{"date":"2024-07-05","current":25.504205,"twenty":-32.797248,"median":-14.85809,"eighty":64.223021,"marketCap":241652347},{"date":"2024-07-12","current":26.738068,"twenty":-32.103684,"median":-14.747373,"eighty":64.223021,"marketCap":253343197},{"date":"2024-07-19","current":26.908709,"twenty":-31.576576,"median":-14.673563,"eighty":64.223021,"marketCap":254960017},{"date":"2024-07-26","current":26.69869,"twenty":-30.406121,"median":-14.570228,"eighty":64.223021,"marketCap":252970085},{"date":"2024-08-02","current":24.217838,"twenty":-30.075723,"median":-14.252842,"eighty":64.223021,"marketCap":229464015},{"date":"2024-08-09","current":25.267934,"twenty":-28.969868,"median":-13.807904,"eighty":64.223021,"marketCap":239413674},{"date":"2024-08-16","current":20.481093,"twenty":-28.308816,"median":-13.071593,"eighty":64.223021,"marketCap":270780525},{"date":"2024-08-23","current":20.462233,"twenty":-28.121992,"median":-12.717153,"eighty":64.223021,"marketCap":270531187},{"date":"2024-08-30","current":20.679114,"twenty":-28.089612,"median":-12.525357,"eighty":64.223021,"marketCap":273398568},{"date":"2024-09-06","current":18.010537,"twenty":-28.030258,"median":-12.436495,"eighty":64.223021,"marketCap":238117312},{"date":"2024-09-13","current":18.434869,"twenty":-27.998127,"median":-12.36378,"eighty":64.223021,"marketCap":243727406},{"date":"2024-09-20","current":18.755476,"twenty":-27.925747,"median":-12.222373,"eighty":64.223021,"marketCap":247966143},{"date":"2024-09-27","current":18.227418,"twenty":-27.545008,"median":-12.098008,"eighty":64.223021,"marketCap":240984693},{"date":"2024-10-04","current":19.057223,"twenty":-27.288894,"median":-12.029304,"eighty":64.223021,"marketCap":251955543},{"date":"2024-10-11","current":19.415548,"twenty":-27.172735,"median":-11.937781,"eighty":64.223021,"marketCap":256692956},{"date":"2024-10-18","current":18.576313,"twenty":-27.015535,"median":-11.822525,"eighty":64.223021,"marketCap":245597437},{"date":"2024-10-25","current":19.085512,"twenty":-26.886355,"median":-11.762006,"eighty":64.223021,"marketCap":252329550},{"date":"2024-11-01","current":18.019967,"twenty":-26.847039,"median":-11.643915,"eighty":64.223021,"marketCap":238241981},{"date":"2024-11-08","current":22.18785,"twenty":-26.818956,"median":-11.601522,"eighty":64.223021,"marketCap":293345568},{"date":"2024-11-15","current":19.374178,"twenty":-26.818956,"median":-11.601522,"eighty":64.223021,"marketCap":311226799},{"date":"2024-11-22","current":21.649382,"twenty":-26.818956,"median":-11.601522,"eighty":64.223021,"marketCap":347775677},{"date":"2024-11-29","current":21.5562,"twenty":-26.818956,"median":-11.601522,"eighty":64.223021,"marketCap":346278795},{"date":"2024-12-06","current":20.181759,"twenty":-26.818956,"median":-11.601522,"eighty":64.223021,"marketCap":324199779},{"date":"2024-12-13","current":20.11488,"twenty":-26.818956,"median":-11.514491,"eighty":64.223021,"marketCap":323125432},{"date":"2024-12-20","current":19.228488,"twenty":-26.818956,"median":-11.369193,"eighty":64.223021,"marketCap":308886429},{"date":"2024-12-27","current":19.803865,"twenty":-26.818956,"median":-11.303781,"eighty":64.223021,"marketCap":318129290},{"date":"2025-01-03","current":21.568874,"twenty":-26.818956,"median":-11.276939,"eighty":64.223021,"marketCap":346482392},{"date":"2025-01-10","current":20.542525,"twenty":-26.818956,"median":-11.219443,"eighty":64.304625,"marketCap":329995126},{"date":"2025-01-17","current":21.763258,"twenty":-26.818956,"median":-11.03577,"eighty":64.304625,"marketCap":349604980},{"date":"2025-01-24","current":21.91099,"twenty":-26.818956,"median":-10.9753,"eighty":64.304625,"marketCap":351978147},{"date":"2025-01-31","current":20.348141,"twenty":-26.818956,"median":-10.91483,"eighty":64.304625,"marketCap":326872538},{"date":"2025-02-07","current":19.904945,"twenty":-26.818956,"median":-10.91483,"eighty":64.304625,"marketCap":319753036},{"date":"2025-02-14","current":21.413367,"twenty":-26.818956,"median":-10.91483,"eighty":64.304625,"marketCap":343984321},{"date":"2025-02-21","current":20.589177,"twenty":-26.818956,"median":-10.885133,"eighty":64.304625,"marketCap":330744547},{"date":"2025-02-28","current":19.990474,"twenty":-26.818956,"median":-10.532245,"eighty":64.304625,"marketCap":321126975},{"date":"2025-03-07","current":16.833674,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":270416142},{"date":"2025-03-14","current":17.603436,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":282781591},{"date":"2025-03-21","current":15.717548,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":270766201},{"date":"2025-03-28","current":15.790146,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":272016853},{"date":"2025-04-04","current":13.031408,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":224492069},{"date":"2025-04-11","current":13.445219,"twenty":-26.818956,"median":-10.532245,"eighty":64.304625,"marketCap":231620787},{"date":"2025-04-17","current":14.149423,"twenty":-26.818956,"median":-10.532245,"eighty":64.304625,"marketCap":243752113},{"date":"2025-04-25","current":14.179506,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":244270352},{"date":"2025-05-02","current":13.845358,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":238513981},{"date":"2025-05-09","current":14.862331,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":256033371},{"date":"2025-05-16","current":18.348898,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":311619334},{"date":"2025-05-23","current":17.743908,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":301344792},{"date":"2025-05-30","current":18.053781,"twenty":-26.818956,"median":-10.675258,"eighty":64.38623,"marketCap":306607362},{"date":"2025-06-06","current":18.216095,"twenty":-26.818956,"median":-10.44363,"eighty":64.38623,"marketCap":309363947},{"date":"2025-06-13","current":18.880109,"twenty":-26.818956,"median":-9.810158,"eighty":64.38623,"marketCap":320640883},{"date":"2025-06-20","current":20.215513,"twenty":-26.818956,"median":-9.810158,"eighty":64.467835,"marketCap":343320054},{"date":"2025-06-27","current":19.529366,"twenty":-26.818956,"median":-9.810158,"eighty":64.467835,"marketCap":331667220},{"date":"2025-07-03","current":18.821085,"twenty":-26.818956,"median":-9.810158,"eighty":64.467835,"marketCap":319638488},{"date":"2025-07-11","current":18.223473,"twenty":-26.818956,"median":-9.810158,"eighty":64.467835,"marketCap":309489246},{"date":"2025-07-18","current":18.134938,"twenty":-26.818956,"median":-9.810158,"eighty":64.467835,"marketCap":307985654},{"date":"2025-07-25","current":17.9136,"twenty":-26.818956,"median":-9.810158,"eighty":64.467835,"marketCap":304226676},{"date":"2025-08-01","current":17.77342,"twenty":-26.818956,"median":-9.810158,"eighty":64.467835,"marketCap":301845989},{"date":"2025-08-08","current":17.758664,"twenty":-26.818956,"median":-9.810158,"eighty":64.467835,"marketCap":301595391},{"date":"2025-08-15","current":17.048757,"twenty":-26.818956,"median":-9.237899,"eighty":64.467835,"marketCap":305530769},{"date":"2025-08-22","current":18.105556,"twenty":-26.818956,"median":13.220164,"eighty":64.467835,"marketCap":324469663},{"date":"2025-08-29","current":18.546472,"twenty":-26.818956,"median":13.445219,"eighty":64.467835,"marketCap":332371321},{"date":"2025-09-05","current":18.966392,"twenty":-26.818956,"median":13.786834,"eighty":64.524283,"marketCap":339896709},{"date":"2025-09-12","current":18.60946,"twenty":-26.818956,"median":13.99064,"eighty":64.467835,"marketCap":333500129},{"date":"2025-09-19","current":19.13436,"twenty":-26.818956,"median":14.608087,"eighty":64.467835,"marketCap":342906864},{"date":"2025-09-26","current":19.890216,"twenty":-26.818956,"median":15.790146,"eighty":64.467835,"marketCap":356452563},{"date":"2025-10-03","current":18.71444,"twenty":-26.818956,"median":16.08054,"eighty":64.467835,"marketCap":335381476},{"date":"2025-10-10","current":18.966392,"twenty":-26.818956,"median":16.378193,"eighty":64.467835,"marketCap":339896709},{"date":"2025-10-17","current":18.259526,"twenty":-26.818956,"median":17.048757,"eighty":64.467835,"marketCap":327228972},{"date":"2025-10-24","current":19.596272,"twenty":-26.818956,"median":17.409051,"eighty":64.467835,"marketCap":351184792},{"date":"2025-10-31","current":19.512288,"twenty":-26.818956,"median":17.611106,"eighty":64.467835,"marketCap":349679714},{"date":"2025-11-07","current":20.198158,"twenty":-26.818956,"median":17.66464,"eighty":64.467835,"marketCap":361971182},{"date":"2025-11-14","current":19.891315,"twenty":-26.818956,"median":17.741625,"eighty":64.467835,"marketCap":371788564},{"date":"2025-11-21","current":20.509976,"twenty":-26.818956,"median":17.741625,"eighty":63.447774,"marketCap":383351968},{"date":"2025-11-28","current":21.007595,"twenty":-26.818956,"median":17.741625,"eighty":63.107754,"marketCap":392652967},{"date":"2025-12-05","current":21.713677,"twenty":-26.818956,"median":17.741625,"eighty":62.329469,"marketCap":405850329},{"date":"2025-12-12","current":22.520627,"twenty":-26.818956,"median":17.741625,"eighty":61.884071,"marketCap":420933030},{"date":"2025-12-19","current":21.370723,"twenty":-26.818956,"median":17.741625,"eighty":61.360074,"marketCap":399440182},{"date":"2025-12-26","current":22.870305,"twenty":-26.818956,"median":17.741625,"eighty":61.255275,"marketCap":427468867},{"date":"2026-01-02","current":22.62822,"twenty":-26.818956,"median":17.741625,"eighty":60.626478,"marketCap":422944057},{"date":"2026-01-09","current":23.462068,"twenty":-26.818956,"median":17.741625,"eighty":60.33828,"marketCap":438529514},{"date":"2026-01-16","current":22.998072,"twenty":-26.818956,"median":17.741625,"eighty":59.657083,"marketCap":429856961},{"date":"2026-01-23","current":23.280504,"twenty":-26.818956,"median":17.741625,"eighty":59.002087,"marketCap":435135906},{"date":"2026-01-30","current":23.213258,"twenty":-26.818956,"median":17.741625,"eighty":59.002087,"marketCap":433879014},{"date":"2026-02-06","current":23.381373,"twenty":-26.818956,"median":17.741625,"eighty":58.211463,"marketCap":437021244},{"date":"2026-02-13","current":24.470755,"twenty":-26.818956,"median":17.741625,"eighty":30.557792,"marketCap":457382889},{"date":"2026-02-20","current":25.250807,"twenty":-26.818956,"median":17.741625,"eighty":28.56261,"marketCap":471962833},{"date":"2026-02-27","current":25.822396,"twenty":-26.818956,"median":17.741625,"eighty":28.090067,"marketCap":482646412},{"date":"2026-03-06","current":25.217184,"twenty":-26.818956,"median":17.741625,"eighty":27.433757,"marketCap":471334387},{"date":"2026-03-13","current":24.322815,"twenty":-26.818956,"median":17.741625,"eighty":26.882456,"marketCap":454617727},{"date":"2026-03-20","current":24.937754,"twenty":-26.818956,"median":17.741625,"eighty":26.567428,"marketCap":496959553},{"date":"2026-03-27","current":25.038818,"twenty":-26.818956,"median":17.741625,"eighty":26.423039,"marketCap":498973573},{"date":"2026-04-02","current":23.617594,"twenty":-26.818956,"median":17.741625,"eighty":26.252399,"marketCap":470651410},{"date":"2026-04-10","current":24.141868,"twenty":-26.818956,"median":17.741625,"eighty":25.858613,"marketCap":481099142},{"date":"2026-04-17","current":24.331364,"twenty":-26.818956,"median":17.741625,"eighty":25.728252,"marketCap":484875430},{"date":"2026-04-24","current":24.255566,"twenty":-26.818956,"median":17.741625,"eighty":25.573587,"marketCap":483364915},{"date":"2026-05-01","current":25.72398,"twenty":-26.818956,"median":17.741625,"eighty":25.464827,"marketCap":512627471},{"date":"2026-05-08","current":25.022244,"twenty":-26.818956,"median":17.741625,"eighty":25.439095,"marketCap":498643286},{"date":"2026-05-15","current":24.282877,"twenty":-26.818956,"median":17.743908,"eighty":25.267934,"marketCap":530265182},{"date":"2026-05-22","current":24.438647,"twenty":-26.678543,"median":17.790045,"eighty":25.267934,"marketCap":533666741},{"date":"2026-05-29","current":23.798258,"twenty":-26.532976,"median":17.836132,"eighty":25.298132,"marketCap":519682556},{"date":"2026-06-05","current":23.86172,"twenty":-26.395618,"median":17.920978,"eighty":25.267934,"marketCap":521068376},{"date":"2026-06-12","current":24.473263,"twenty":-26.212474,"median":17.972624,"eighty":25.267934,"marketCap":534422643},{"date":"2026-06-18","current":24.092491,"twenty":-26.120902,"median":18.019967,"eighty":25.267934,"marketCap":526107722},{"date":"2026-06-26","current":25.021344,"twenty":-26.014891,"median":18.068537,"eighty":25.418922,"marketCap":546391090},{"date":"2026-07-02","current":23.613641,"twenty":-25.937758,"median":18.134938,"eighty":25.418922,"marketCap":515651079},{"date":"2026-07-10","current":23.172434,"twenty":-25.788358,"median":18.202818,"eighty":25.418922,"marketCap":506016450},{"date":"2026-07-17","current":22.917856,"twenty":-25.669697,"median":18.236847,"eighty":25.418922,"marketCap":500457218},{"date":"2026-07-24","current":22.489701,"twenty":-25.60352,"median":18.300971,"eighty":25.418922,"marketCap":491107601},{"date":"2026-07-31","current":20.76551,"twenty":-25.541141,"median":18.364506,"eighty":25.418922,"marketCap":453456440},{"date":"2026-08-07","current":21.06059,"twenty":-25.459739,"median":18.444299,"eighty":25.418922,"marketCap":459900095},{"date":"2026-08-14","current":23.139948,"twenty":-25.378337,"median":18.490482,"eighty":25.418922,"marketCap":473882990},{"date":"2026-08-21","current":22.371555,"twenty":-25.319648,"median":18.525476,"eighty":25.418922,"marketCap":458147083}],"updateTime":1787642426904},"$inf$@#url:\"https://stock-news.skytigris.cn/v3/notice/important/events/list\",params:#symbol:\"NGS\",pageSize:20,pageCount:10,market:\"us\",,,undefined,":[{"items":[{"cdn_pdf":false,"hasAttachments":true,"id":"9703038","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499120000040-NGS","pdf_url":null,"pub_time":1589126400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Quarterly report [Sections 13 or 15(d)]","symbol":"NGS","title":"Quarterly report [Sections 13 or 15(d)]","titleType":"Quarterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/0001084991-20-000040-index.htm","us_notice_code":"Form 10-Q","us_title_en":null,"is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-Q","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs-20200331.htm","primary":true,"translateUrl":null,"linkName":"ngs-20200331.htm","type":"10-Q","id":"NTFILE8KpJe3BKUNpKgKmA","market":"us","size":1366531},{"description":"EX-31.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs033120-ex311.htm","primary":false,"translateUrl":null,"linkName":"ngs033120-ex311.htm","type":"EX-31.1","id":"NTFILECDcQmhgmwzdFQfvH","market":"us","size":15867},{"description":"EX-31.2","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs033120-ex312.htm","primary":false,"translateUrl":null,"linkName":"ngs033120-ex312.htm","type":"EX-31.2","id":"NTFILE2hZxkRNSpENsqHBc","market":"us","size":13619},{"description":"EX-32.1","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs033120-ex321.htm","primary":false,"translateUrl":null,"linkName":"ngs033120-ex321.htm","type":"EX-32.1","id":"NTFILEDKtsyZY2N2v8foag","market":"us","size":10647},{"description":"EX-32.2","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs033120-ex322.htm","primary":false,"translateUrl":null,"linkName":"ngs033120-ex322.htm","type":"EX-32.2","id":"NTFILEFEkCZ7UmbAiLBhQq","market":"us","size":10652},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs-20200331.xsd","primary":false,"translateUrl":null,"linkName":"ngs-20200331.xsd","type":"EX-101.SCH","id":"NTFILE81Vi64kEgjR2V3PY","market":"us","size":38613},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs-20200331_cal.xml","primary":false,"translateUrl":null,"linkName":"ngs-20200331_cal.xml","type":"EX-101.CAL","id":"NTFILE2A1GdrgxsxwGk8YY","market":"us","size":73315},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs-20200331_def.xml","primary":false,"translateUrl":null,"linkName":"ngs-20200331_def.xml","type":"EX-101.DEF","id":"NTFILE2YuGp8cDz4dddpW6","market":"us","size":194249},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs-20200331_lab.xml","primary":false,"translateUrl":null,"linkName":"ngs-20200331_lab.xml","type":"EX-101.LAB","id":"NTFILE2bDM7XTVD4jqPqHg","market":"us","size":517984},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs-20200331_pre.xml","primary":false,"translateUrl":null,"linkName":"ngs-20200331_pre.xml","type":"EX-101.PRE","id":"NTFILEHGtywbXaW4UVh1uT","market":"us","size":355348},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":52,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000040/ngs-20200331_htm.xml","primary":false,"translateUrl":null,"linkName":"ngs-20200331_htm.xml","type":"XML","id":"NTFILE2bJiM9vGV4mzr9D2","market":"us","size":1143580}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"Quarterly Report","pubTime":"2020-05-11 00:00","pubTimestamp":1589126400,"title_zh":"Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9702872","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499120000038-NGS","pdf_url":null,"pub_time":1589126400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 2.02 and 9.01","symbol":"NGS","title":"Current report, items 2.02 and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000038/0001084991-20-000038-index.htm","us_notice_code":"Form 8-K","us_title_en":null,"is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"EX-99.1","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000038/ngsq12020earningsrelea.htm","primary":true,"translateUrl":null,"linkName":"ngsq12020earningsrelea.htm","type":"EX-99.1","id":"NTFILEDQw2pLd3EfjpwsVE","market":"us","size":362928},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000038/q120208-k.htm","primary":false,"translateUrl":null,"linkName":"q120208-k.htm","type":"8-K","id":"NTFILE4Q2vvzw56hsBohjw","market":"us","size":35922},{"description":"","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000038/image11.jpg","primary":false,"translateUrl":null,"linkName":"image11.jpg","type":"GRAPHIC","id":"NTFILE5rDvxq4QJZpKENsA","market":"us","size":6502}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-05-11 00:00","pubTimestamp":1589126400,"title_zh":"Current report, items 2.02 and 9.01","summary_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9673671","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499120000031-NGS","pdf_url":null,"pub_time":1588521600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"NGS","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000031/0001084991-20-000031-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000031/a8k2020compensationawa.htm","primary":true,"translateUrl":null,"linkName":"a8k2020compensationawa.htm","type":"8-K","id":"NTFILEA1Uu39LS6RqtZLkT","market":"us","size":39251}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-05-04 00:00","pubTimestamp":1588521600,"title_zh":"8-K  - Current report","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9660268","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499120000021-NGS","pdf_url":null,"pub_time":1588089600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"8-K  - Current report","symbol":"NGS","title":"8-K  - Current report","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000021/0001084991-20-000021-index.htm","us_notice_code":"Form 8-K","us_title_en":"Item 8.01: Other Events","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000021/a8k202045-dayproxyexte.htm","primary":true,"translateUrl":null,"linkName":"a8k202045-dayproxyexte.htm","type":"8-K","id":"NTFILE3MKj5ULLV5XrJ2ne","market":"us","size":34727}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-04-29 00:00","pubTimestamp":1588089600,"title_zh":"8-K  - Current report","summary_en":"Item 8.01: Other Events","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9461770","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499120000019-NGS","pdf_url":null,"pub_time":1586966400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 2.03 and 8.01","symbol":"NGS","title":"Current report, items 2.03 and 8.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000019/0001084991-20-000019-index.htm","us_notice_code":"Form 8-K","us_title_en":null,"is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"EX-10.1","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000019/exhibit101ppploan.htm","primary":true,"translateUrl":null,"linkName":"exhibit101ppploan.htm","type":"EX-10.1","id":"NTFILEA6RJ5vRuojVozti6","market":"us","size":52927},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000019/a8kppploan41020.htm","primary":false,"translateUrl":null,"linkName":"a8kppploan41020.htm","type":"8-K","id":"NTFILEGAJg4xnpGMXDs89W","market":"us","size":39460},{"description":"","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000019/image01.jpg","primary":false,"translateUrl":null,"linkName":"image01.jpg","type":"GRAPHIC","id":"NTFILE5UaU2dzm4nzydKo7","market":"us","size":6735}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-04-16 00:00","pubTimestamp":1586966400,"title_zh":"Current report, items 2.03 and 8.01","summary_en":"Item 2.03: Creation of a Direct Financial Obligation or an Obligation under an Off-Balance Sheet Arrangement of a Registrant;\nItem 8.01: Other Events","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9402734","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499120000016-NGS","pdf_url":null,"pub_time":1585670400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 2.02 and 9.01","symbol":"NGS","title":"Current report, items 2.02 and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000016/0001084991-20-000016-index.htm","us_notice_code":"Form 8-K","us_title_en":null,"is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"EX-99","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000016/a2019q4earningsrelease.htm","primary":true,"translateUrl":null,"linkName":"a2019q4earningsrelease.htm","type":"EX-99","id":"NTFILEEBZkZdnh2YkipEcA","market":"us","size":665636},{"description":"8-K","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000016/q420198k.htm","primary":false,"translateUrl":null,"linkName":"q420198k.htm","type":"8-K","id":"NTFILE52uVKQ46E8K4nGb8","market":"us","size":41810},{"description":"","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000016/image11.jpg","primary":false,"translateUrl":null,"linkName":"image11.jpg","type":"GRAPHIC","id":"NTFILE5vGuqMVBEPTwywxJ","market":"us","size":61443},{"description":"","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000016/image111.jpg","primary":false,"translateUrl":null,"linkName":"image111.jpg","type":"GRAPHIC","id":"NTFILEA738YqaCAbkmkhSu","market":"us","size":13953}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2020-04-01 00:00","pubTimestamp":1585670400,"title_zh":"Current report, items 2.02 and 9.01","summary_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9395773","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499120000011-NGS","pdf_url":null,"pub_time":1585584000000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Annual report [Section 13 and 15(d), not S-K Item 405]","symbol":"NGS","title":"Annual report [Section 13 and 15(d), not S-K Item 405]","titleType":"Annual Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/0001084991-20-000011-index.htm","us_notice_code":"Form 10-K","us_title_en":null,"is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/ngs-20191231.htm","primary":true,"translateUrl":null,"linkName":"ngs-20191231.htm","type":"10-K","id":"NTFILE5G1biQYLs63U5ShF","market":"us","size":3473268},{"description":"EX-21.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/a123119-ngsxex211subsi.htm","primary":false,"translateUrl":null,"linkName":"a123119-ngsxex211subsi.htm","type":"EX-21.1","id":"NTFILE8HVEGfswg8DdV8MW","market":"us","size":3935},{"description":"EX-23.1","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/a123119-ex231bdoconsent.htm","primary":false,"translateUrl":null,"linkName":"a123119-ex231bdoconsent.htm","type":"EX-23.1","id":"NTFILE6vueZVrWrhvsx17v","market":"us","size":3624},{"description":"EX-31.1","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/a123119-ngsxex311steph.htm","primary":false,"translateUrl":null,"linkName":"a123119-ngsxex311steph.htm","type":"EX-31.1","id":"NTFILEHqYA6rChCrsrXTcD","market":"us","size":17845},{"description":"EX-31.2","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/a123119-ngsxex312james.htm","primary":false,"translateUrl":null,"linkName":"a123119-ngsxex312james.htm","type":"EX-31.2","id":"NTFILECrVQuB1hodvh6szL","market":"us","size":15688},{"description":"EX-32.1","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/a123119-ngsxex321steph.htm","primary":false,"translateUrl":null,"linkName":"a123119-ngsxex321steph.htm","type":"EX-32.1","id":"NTFILEBokpoT7UEbMnNPTb","market":"us","size":12538},{"description":"EX-32.2","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/a123119-ngsxex322james.htm","primary":false,"translateUrl":null,"linkName":"a123119-ngsxex322james.htm","type":"EX-32.2","id":"NTFILE6EmTUeu9dX1LK8U9","market":"us","size":12546},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/ngs-20191231.xsd","primary":false,"translateUrl":null,"linkName":"ngs-20191231.xsd","type":"EX-101.SCH","id":"NTFILE6Vh27e3DsnUKRjbq","market":"us","size":65761},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/ngs-20191231_cal.xml","primary":false,"translateUrl":null,"linkName":"ngs-20191231_cal.xml","type":"EX-101.CAL","id":"NTFILEDSsAGSCkJ58Tqx6E","market":"us","size":118594},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/ngs-20191231_def.xml","primary":false,"translateUrl":null,"linkName":"ngs-20191231_def.xml","type":"EX-101.DEF","id":"NTFILEkfchmeUbzQRaCsAo","market":"us","size":376147},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/ngs-20191231_lab.xml","primary":false,"translateUrl":null,"linkName":"ngs-20191231_lab.xml","type":"EX-101.LAB","id":"NTFILE33kmXtiniJk4GYVP","market":"us","size":828858},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":12,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/ngs-20191231_pre.xml","primary":false,"translateUrl":null,"linkName":"ngs-20191231_pre.xml","type":"EX-101.PRE","id":"NTFILE6hgRLsZBWVdKvLxK","market":"us","size":629411},{"description":"","seq":13,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/ngs-20191231_g1.jpg","primary":false,"translateUrl":null,"linkName":"ngs-20191231_g1.jpg","type":"GRAPHIC","id":"NTFILEGpkVxJxcQRoN1hSK","market":"us","size":10914},{"description":"","seq":14,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/ngs-20191231_g2.jpg","primary":false,"translateUrl":null,"linkName":"ngs-20191231_g2.jpg","type":"GRAPHIC","id":"NTFILEGrh4FTuHb3A48LBj","market":"us","size":108674},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":98,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499120000011/ngs-20191231_htm.xml","primary":false,"translateUrl":null,"linkName":"ngs-20191231_htm.xml","type":"XML","id":"NTFILECnwDQ3aihw2g2aRm","market":"us","size":3327482}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Annual Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"Annual Report","pubTime":"2020-03-31 00:00","pubTimestamp":1585584000,"title_zh":"Annual report [Section 13 and 15(d), not S-K Item 405","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9090762","market":"us","labels":[],"media":"sec.gov","original_id":"AN89843220000109-NGS","pdf_url":null,"pub_time":1581523200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of acquisition of beneficial ownership by individuals","symbol":"NGS","title":"Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000089843220000109/0000898432-20-000109-index.htm","us_notice_code":"Form SC 13G","us_title_en":"Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000089843220000109/sc_13g.htm","primary":true,"translateUrl":null,"linkName":"sc_13g.htm","type":"SC 13G","id":"NTFILE5JiHBYgp4KDUEcUE","market":"us","size":137640}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-02-13 00:00","pubTimestamp":1581523200,"title_zh":"Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9083268","market":"us","labels":[],"media":"sec.gov","original_id":"AN103738920000052-NGS","pdf_url":null,"pub_time":1581436800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of acquisition of beneficial ownership by individuals","symbol":"NGS","title":"Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000103738920000052/0001037389-20-000052-index.htm","us_notice_code":"Form SC 13G","us_title_en":"Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1037389/000103738920000052/ngs-13g_20191231.txt","primary":true,"translateUrl":null,"linkName":"ngs-13g_20191231.txt","type":"SC 13G","id":"NTFILEFJqzynkLfpX5cNcL","market":"us","size":11728}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-02-12 00:00","pubTimestamp":1581436800,"title_zh":"Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9082447","market":"us","labels":[],"media":"sec.gov","original_id":"AN125889720001175-NGS","pdf_url":null,"pub_time":1581436800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"[Amend] Statement of acquisition of beneficial ownership by individuals","symbol":"NGS","title":"[Amend] Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000125889720001175/0001258897-20-001175-index.htm","us_notice_code":"Form SC 13G/A","us_title_en":"[Amend] Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"SCHEDULE 13G/A","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/354204/000125889720001175/dfs432.htm","primary":true,"translateUrl":null,"linkName":"dfs432.htm","type":"SC 13G/A","id":"NTFILE8XLKLSTc82VCC64N","market":"us","size":51250}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-02-12 00:00","pubTimestamp":1581436800,"title_zh":"Amend] Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9066248","market":"us","labels":[],"media":"sec.gov","original_id":"AN31506620001127-NGS","pdf_url":null,"pub_time":1581004800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of acquisition of beneficial ownership by individuals","symbol":"NGS","title":"Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000031506620001127/0000315066-20-001127-index.htm","us_notice_code":"Form SC 13G","us_title_en":"Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/315066/000031506620001127/filing.txt","primary":true,"translateUrl":null,"linkName":"filing.txt","type":"SC 13G","id":"NTFILEFvYP4rFQ5iu4xjdp","market":"us","size":6633}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-02-07 00:00","pubTimestamp":1581004800,"title_zh":"Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9056392","market":"us","labels":[],"media":"sec.gov","original_id":"AN83423720005932-NGS","pdf_url":null,"pub_time":1580832000000,"showTitleType":true,"size":0,"source":"sec_us","summary":"[Amend] Statement of acquisition of beneficial ownership by individuals","symbol":"NGS","title":"[Amend] Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000083423720005932/0000834237-20-005932-index.htm","us_notice_code":"Form SC 13G/A","us_title_en":"[Amend] Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000083423720005932/us63886q1094_020520.txt","primary":true,"translateUrl":null,"linkName":"us63886q1094_020520.txt","type":"SC 13G/A","id":"NTFILEJBYihckUJ1puKaah","market":"us","size":11460}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-02-05 00:00","pubTimestamp":1580832000,"title_zh":"Amend] Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"9045179","market":"us","labels":[],"media":"sec.gov","original_id":"AN102387520000021-NGS","pdf_url":null,"pub_time":1580659200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"[Amend] Statement of acquisition of beneficial ownership by individuals","symbol":"NGS","title":"[Amend] Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000102387520000021/0001023875-20-000021-index.htm","us_notice_code":"Form SC 13G/A","us_title_en":"[Amend] Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1023875/000102387520000021/natu19a2.htm","primary":true,"translateUrl":null,"linkName":"natu19a2.htm","type":"SC 13G/A","id":"NTFILE34D6yB3Gyc9uc51s","market":"us","size":94974}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2020-02-03 00:00","pubTimestamp":1580659200,"title_zh":"Amend] Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8771693","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499119000064-NGS","pdf_url":null,"pub_time":1574092800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"NGS","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000064/0001084991-19-000064-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"PRIMARY DOCUMENT","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000064/xslF345X03/primary_doc.xml","primary":true,"translateUrl":null,"linkName":"primary_doc.html","type":"4","id":"NTFILEFDADZUPfsUoxn612","market":"us","size":0},{"description":"PRIMARY DOCUMENT","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000064/primary_doc.xml","primary":false,"translateUrl":null,"linkName":"primary_doc.xml","type":"4","id":"NTFILEGJwAkKsy4yANGnFw","market":"us","size":7542}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-11-19 00:00","pubTimestamp":1574092800,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8771111","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499119000063-NGS","pdf_url":null,"pub_time":1574092800000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 2.02 and 9.01","symbol":"NGS","title":"Current report, items 2.02 and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000063/0001084991-19-000063-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, items 2.02 and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000063/q320198-k.htm","primary":true,"translateUrl":null,"linkName":"q320198-k.htm","type":"8-K","id":"NTFILEGM6H3UPCmUdNAMzu","market":"us","size":29747},{"description":"EX-99.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000063/ngsq32019earningsrelea.htm","primary":false,"translateUrl":null,"linkName":"ngsq32019earningsrelea.htm","type":"EX-99.1","id":"NTFILEGYXNCT5qGWZtfKyN","market":"us","size":521697},{"description":"","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000063/image11.jpg","primary":false,"translateUrl":null,"linkName":"image11.jpg","type":"GRAPHIC","id":"NTFILE8s2bvDe4fvhskUae","market":"us","size":13953},{"description":"","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000063/image111.jpg","primary":false,"translateUrl":null,"linkName":"image111.jpg","type":"GRAPHIC","id":"NTFILEAWUfrGCCTQMqvuVP","market":"us","size":6502}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2019-11-19 00:00","pubTimestamp":1574092800,"title_zh":"Current report, items 2.02 and 9.01","summary_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8745217","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499119000060-NGS","pdf_url":null,"pub_time":1573142400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Quarterly report [Sections 13 or 15(d)]","symbol":"NGS","title":"Quarterly report [Sections 13 or 15(d)]","titleType":"Quarterly Report","type":"usFinancials","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/0001084991-19-000060-index.htm","us_notice_code":"Form 10-Q","us_title_en":"Quarterly report [Sections 13 or 15(d)]","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"10-Q","seq":1,"linkUrl":"https://www.sec.gov/ix?doc=/Archives/edgar/data/1084991/000108499119000060/ngs-20190930.htm","primary":true,"translateUrl":null,"linkName":"ngs-20190930.htm","type":"10-Q","id":"NTFILEGNAUcpob9sHCfEPq","market":"us","size":1815308},{"description":"EX-31.1","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs093019-ex311.htm","primary":false,"translateUrl":null,"linkName":"ngs093019-ex311.htm","type":"EX-31.1","id":"NTFILE53ZYXSq4ijZVUSK4","market":"us","size":15507},{"description":"EX-31.2","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs093019-ex312.htm","primary":false,"translateUrl":null,"linkName":"ngs093019-ex312.htm","type":"EX-31.2","id":"NTFILE8aDYd9hqt1ifCTtp","market":"us","size":13461},{"description":"EX-32.1","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs093019-ex321.htm","primary":false,"translateUrl":null,"linkName":"ngs093019-ex321.htm","type":"EX-32.1","id":"NTFILE4gX5wJA7kX5vgY81","market":"us","size":10467},{"description":"EX-32.2","seq":5,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs093019-ex322.htm","primary":false,"translateUrl":null,"linkName":"ngs093019-ex322.htm","type":"EX-32.2","id":"NTFILE8PFoZR6TTXCeUtPZ","market":"us","size":10556},{"description":"XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT","seq":6,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs-20190930.xsd","primary":false,"translateUrl":null,"linkName":"ngs-20190930.xsd","type":"EX-101.SCH","id":"NTFILE4TfapW1PSifB5Eh7","market":"us","size":40052},{"description":"XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT","seq":7,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs-20190930_cal.xml","primary":false,"translateUrl":null,"linkName":"ngs-20190930_cal.xml","type":"EX-101.CAL","id":"NTFILE7Vzq7bqCUGTPTrbC","market":"us","size":82828},{"description":"XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT","seq":8,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs-20190930_def.xml","primary":false,"translateUrl":null,"linkName":"ngs-20190930_def.xml","type":"EX-101.DEF","id":"NTFILEBpzfwijiMMpKRRRM","market":"us","size":166076},{"description":"XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT","seq":9,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs-20190930_lab.xml","primary":false,"translateUrl":null,"linkName":"ngs-20190930_lab.xml","type":"EX-101.LAB","id":"NTFILEAKSpspajAra5XShu","market":"us","size":528625},{"description":"XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT","seq":10,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs-20190930_pre.xml","primary":false,"translateUrl":null,"linkName":"ngs-20190930_pre.xml","type":"EX-101.PRE","id":"NTFILE2No8N12X95rqqyQb","market":"us","size":341941},{"description":"","seq":11,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs-20190930_g1.jpg","primary":false,"translateUrl":null,"linkName":"ngs-20190930_g1.jpg","type":"GRAPHIC","id":"NTFILE2ESNVxKE5NZwvubY","market":"us","size":13953},{"description":"EXTRACTED XBRL INSTANCE DOCUMENT","seq":17,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000060/ngs-20190930_htm.xml","primary":false,"translateUrl":null,"linkName":"ngs-20190930_htm.xml","type":"XML","id":"NTFILEHx1vt91rdjoCDoaA","market":"us","size":1382743}],"type_name":"Financial Report","type_name_en":"Financial Report","titleTypeEn":"Quarterly Report","us_type":"财务报告","us_type_zh":"财务报告","earn_infos":[],"event_type":"important_notice","event_name":"Quarterly Report","pubTime":"2019-11-08 00:00","pubTimestamp":1573142400,"title_zh":"Quarterly report [Sections 13 or 15(d","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8605898","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499119000057-NGS","pdf_url":null,"pub_time":1572969600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, item 5.02","symbol":"NGS","title":"Current report, item 5.02","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000057/0001084991-19-000057-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, item 5.02","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000057/gllretirementjlappoint.htm","primary":true,"translateUrl":null,"linkName":"gllretirementjlappoint.htm","type":"8-K","id":"NTFILE6hAvREwEVvWSGx6H","market":"us","size":29025},{"description":"","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000057/image11.jpg","primary":false,"translateUrl":null,"linkName":"image11.jpg","type":"GRAPHIC","id":"NTFILEC1bzNehWH7txuLTW","market":"us","size":13953}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2019-11-06 00:00","pubTimestamp":1572969600,"title_zh":"Current report, item 5.02","summary_en":"Item 5.02: Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8549760","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499119000054-NGS","pdf_url":null,"pub_time":1569945600000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Statement of changes in beneficial ownership of securities","symbol":"NGS","title":"Statement of changes in beneficial ownership of securities","titleType":"Statement Of Changes In Beneficial Ownership","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000054/0001084991-19-000054-index.htm","us_notice_code":"Form 4","us_title_en":"Statement of changes in beneficial ownership of securities","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"PRIMARY DOCUMENT","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000054/xslF345X03/primary_doc.xml","primary":true,"translateUrl":null,"linkName":"primary_doc.html","type":"4","id":"NTFILEB6jHDcjGxmRb45sD","market":"us","size":0},{"description":"PRIMARY DOCUMENT","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000054/primary_doc.xml","primary":false,"translateUrl":null,"linkName":"primary_doc.xml","type":"4","id":"NTFILEB2vwrQar9xR7LS8F","market":"us","size":7019}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Statement Of Changes In Beneficial Ownership","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Statement Of Changes In Beneficial Ownership","pubTime":"2019-10-02 00:00","pubTimestamp":1569945600,"title_zh":"Statement of changes in beneficial ownership of securities","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8532348","market":"us","labels":[],"media":"sec.gov","original_id":"AN151259019000002-NGS","pdf_url":null,"pub_time":1568822400000,"showTitleType":true,"size":0,"source":"sec_us","summary":"[Amend] Statement of acquisition of beneficial ownership by individuals","symbol":"NGS","title":"[Amend] Statement of acquisition of beneficial ownership by individuals","titleType":"Beneficial Ownership Change","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000151259019000002/0001512590-19-000002-index.htm","us_notice_code":"Form SC 13G/A","us_title_en":"[Amend] Statement of acquisition of beneficial ownership by individuals","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000151259019000002/SC13GA_NGS09182019.txt","primary":true,"translateUrl":null,"linkName":"SC13GA_NGS09182019.txt","type":"SC 13G/A","id":"NTFILEHUHVoRDR2P8eLtjA","market":"us","size":5912}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Beneficial Ownership Change","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Beneficial Ownership Change","pubTime":"2019-09-19 00:00","pubTimestamp":1568822400,"title_zh":"Amend] Statement of acquisition of beneficial ownership by individuals","summary_en":"","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0},{"cdn_pdf":false,"hasAttachments":true,"id":"8456904","market":"us","labels":[],"media":"sec.gov","original_id":"AN108499119000053-NGS","pdf_url":null,"pub_time":1565107200000,"showTitleType":true,"size":0,"source":"sec_us","summary":"Current report, items 2.02 and 9.01","symbol":"NGS","title":"Current report, items 2.02 and 9.01","titleType":"Major Issues Report","type":"usAnnouncement","url":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000053/0001084991-19-000053-index.htm","us_notice_code":"Form 8-K","us_title_en":"Current report, items 2.02 and 9.01","is_important":0,"hasEarnInfos":false,"gpt_zh_title":"","gpt_en_title":"","attachments":[{"description":"8-K","seq":1,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000053/q220198-k.htm","primary":true,"translateUrl":null,"linkName":"q220198-k.htm","type":"8-K","id":"NTFILEEXBZhXsJYJMBZVaB","market":"us","size":29726},{"description":"EX-99","seq":2,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000053/ngsq22019earningsrelea.htm","primary":false,"translateUrl":null,"linkName":"ngsq22019earningsrelea.htm","type":"EX-99","id":"NTFILEE1GcyHwbTv9wVm3k","market":"us","size":283451},{"description":"","seq":3,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000053/image1.jpg","primary":false,"translateUrl":null,"linkName":"image1.jpg","type":"GRAPHIC","id":"NTFILEEeEzus285wDnUjRD","market":"us","size":6502},{"description":"","seq":4,"linkUrl":"https://www.sec.gov/Archives/edgar/data/1084991/000108499119000053/image11.jpg","primary":false,"translateUrl":null,"linkName":"image11.jpg","type":"GRAPHIC","id":"NTFILE6F9vWA2Q5nKpN3Zj","market":"us","size":13953}],"type_name":"Transaction Related","type_name_en":"Transaction Related","titleTypeEn":"Major Issues Report","us_type":"交易披露","us_type_zh":"交易披露","earn_infos":[],"event_type":"important_notice","event_name":"Major Issues Report","pubTime":"2019-08-07 00:00","pubTimestamp":1565107200,"title_zh":"Current report, items 2.02 and 9.01","summary_en":"Item 2.02: Results of Operations and Financial Condition;\nItem 9.01: Financial Statements and Exhibits","summary_zh":"","notice_type":"","filling_tag":"","gpt_icon":0}],"pageSize":20,"totalPage":13,"pageCount":10,"totalSize":241,"code":"91000000","status":"200"}]}}