| Seq | Description | Type | Size | |
|---|---|---|---|---|
| 1 | DEF 14A | DEF 14A | 1738.0 KB | Open in viewerDownload |
| 2 | EX-1.PROXY CARD | EX-1.PROXY CARD | 4.7 KB | Open in viewerDownload |
| 3 | XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT | EX-101.SCH | 2.8 KB | Download |
| 4 | XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT | EX-101.DEF | 3.0 KB | Download |
| 5 | XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT | EX-101.LAB | 3.9 KB | Download |
| 6 | XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT | EX-101.PRE | 3.1 KB | Download |
| 7 | a2026proxycard001.jpg | GRAPHIC | 124.1 KB | Open in viewerDownload |
| 8 | a2026proxycard002.jpg | GRAPHIC | 127.9 KB | Open in viewerDownload |
| 9 | ngs-20260428_g1.jpg | GRAPHIC | 46.6 KB | Open in viewerDownload |
| 10 | ngs-20260428_g10.jpg | GRAPHIC | 7213.5 KB | Open in viewerDownload |
| 11 | ngs-20260428_g11.jpg | GRAPHIC | 10171.1 KB | Open in viewerDownload |
| 12 | ngs-20260428_g12.jpg | GRAPHIC | 44.2 KB | Open in viewerDownload |
| 13 | ngs-20260428_g13.jpg | GRAPHIC | 44.0 KB | Open in viewerDownload |
| 14 | ngs-20260428_g14.jpg | GRAPHIC | 11802.4 KB | Open in viewerDownload |
| 15 | ngs-20260428_g15.jpg | GRAPHIC | 124.4 KB | Open in viewerDownload |
| 16 | ngs-20260428_g16.jpg | GRAPHIC | 69.0 KB | Open in viewerDownload |
| 17 | ngs-20260428_g17.jpg | GRAPHIC | 72.3 KB | Open in viewerDownload |
| 18 | ngs-20260428_g2.jpg | GRAPHIC | 66.4 KB | Open in viewerDownload |
| 19 | ngs-20260428_g3.jpg | GRAPHIC | 68.2 KB | Open in viewerDownload |
| 20 | ngs-20260428_g4.jpg | GRAPHIC | 55.5 KB | Open in viewerDownload |
| 21 | ngs-20260428_g5.jpg | GRAPHIC | 11770.0 KB | Open in viewerDownload |
| 22 | ngs-20260428_g6.jpg | GRAPHIC | 1715.4 KB | Open in viewerDownload |
| 23 | ngs-20260428_g7.jpg | GRAPHIC | 1110.0 KB | Open in viewerDownload |
| 24 | ngs-20260428_g8.jpg | GRAPHIC | 11370.5 KB | Open in viewerDownload |
| 25 | ngs-20260428_g9.jpg | GRAPHIC | 10669.5 KB | Open in viewerDownload |
| 27 | IDEA: XBRL DOCUMENT | HTML | 10.5 KB | Open in viewerDownload |
| 28 | IDEA: XBRL DOCUMENT | HTML | 179.5 KB | Open in viewerDownload |
| 29 | IDEA: XBRL DOCUMENT | HTML | 13.3 KB | Open in viewerDownload |
| 30 | IDEA: XBRL DOCUMENT | HTML | 4.2 KB | Open in viewerDownload |
| 31 | IDEA: XBRL DOCUMENT | CSS | 2.6 KB | Download |
| 32 | IDEA: XBRL DOCUMENT | JS | 0.9 KB | Download |
| 34 | IDEA: XBRL DOCUMENT | XML | 3.8 KB | Download |
| 36 | IDEA: XBRL DOCUMENT | JSON | 169.6 KB | Download |
| 37 | IDEA: XBRL DOCUMENT | ZIP | 66392.4 KB | Download |
| 38 | IDEA: XBRL DOCUMENT | XML | 180.8 KB | Download |
| 999 | Full raw SEC SGML submission | Full Submission Text | 185578.3 KB | Open in viewerDownload |
