Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001437749-21-018142-index-headers.html | 2021-08-02 16:08:17 | |
| 0001437749-21-018142-index.html | 2021-08-02 16:08:17 | |
| 0001437749-21-018142.txt | 2021-08-02 16:08:17 | |
 0001437749-21-018142-xbrl.zip | 162862 | 2021-08-02 16:08:17 |
 abbreviatedorgchartforkandqm.jpg | 58477 | 2021-08-02 16:08:17 |
| ex_252935.htm | 10238 | 2021-08-02 16:08:17 |
| ex_252936.htm | 9603 | 2021-08-02 16:08:17 |
| ex_252937.htm | 6155 | 2021-08-02 16:08:17 |
| ex_252938.htm | 6279 | 2021-08-02 16:08:17 |
| ex_261375.htm | 11941 | 2021-08-02 16:08:17 |
| FilingSummary.xml | 32062 | 2021-08-02 16:08:17 |
| Financial_Report.xlsx | 55387 | 2021-08-02 16:08:17 |
| MetaLinks.json | 436821 | 2021-08-02 16:08:17 |
| next-20210630.xsd | 54608 | 2021-08-02 16:08:17 |
| next-20210630_cal.xml | 42883 | 2021-08-02 16:08:17 |
| next-20210630_def.xml | 280576 | 2021-08-02 16:08:17 |
| next-20210630_lab.xml | 250566 | 2021-08-02 16:08:17 |
| next-20210630_pre.xml | 309661 | 2021-08-02 16:08:17 |
| next20210630_10q.htm | 1168144 | 2021-08-02 16:08:17 |
| next20210630_10q_htm.xml | 737024 | 2021-08-02 16:08:17 |
| R1.htm | 52438 | 2021-08-02 16:08:17 |
| R10.htm | 26262 | 2021-08-02 16:08:17 |
| R11.htm | 56133 | 2021-08-02 16:08:17 |
| R12.htm | 15067 | 2021-08-02 16:08:17 |
| R13.htm | 14733 | 2021-08-02 16:08:17 |
| R14.htm | 41622 | 2021-08-02 16:08:17 |
| R15.htm | 42542 | 2021-08-02 16:08:17 |
| R16.htm | 23829 | 2021-08-02 16:08:17 |
| R17.htm | 9679 | 2021-08-02 16:08:17 |
| R18.htm | 11485 | 2021-08-02 16:08:17 |
| R19.htm | 18771 | 2021-08-02 16:08:17 |
| R2.htm | 102485 | 2021-08-02 16:08:17 |
| R20.htm | 7234 | 2021-08-02 16:08:17 |
| R21.htm | 13643 | 2021-08-02 16:08:17 |
| R22.htm | 24123 | 2021-08-02 16:08:17 |
| R23.htm | 56893 | 2021-08-02 16:08:17 |
| R24.htm | 13279 | 2021-08-02 16:08:17 |
| R25.htm | 13732 | 2021-08-02 16:08:17 |
| R26.htm | 28068 | 2021-08-02 16:08:17 |
| R27.htm | 39655 | 2021-08-02 16:08:17 |
| R28.htm | 22773 | 2021-08-02 16:08:17 |
| R29.htm | 11781 | 2021-08-02 16:08:17 |
| R3.htm | 36214 | 2021-08-02 16:08:17 |
| R30.htm | 11469 | 2021-08-02 16:08:17 |
| R31.htm | 3529 | 2021-08-02 16:08:17 |
| R32.htm | 21365 | 2021-08-02 16:08:17 |
| R33.htm | 10687 | 2021-08-02 16:08:17 |
| R34.htm | 17951 | 2021-08-02 16:08:17 |
| R35.htm | 23758 | 2021-08-02 16:08:17 |
| R36.htm | 8592 | 2021-08-02 16:08:17 |
| R37.htm | 12423 | 2021-08-02 16:08:17 |
| R38.htm | 49325 | 2021-08-02 16:08:17 |
| R39.htm | 14372 | 2021-08-02 16:08:17 |
| R4.htm | 60085 | 2021-08-02 16:08:17 |
| R40.htm | 11316 | 2021-08-02 16:08:17 |
| R41.htm | 15503 | 2021-08-02 16:08:17 |
| R42.htm | 11023 | 2021-08-02 16:08:17 |
| R43.htm | 13795 | 2021-08-02 16:08:17 |
| R44.htm | 11698 | 2021-08-02 16:08:17 |
| R45.htm | 5229 | 2021-08-02 16:08:17 |
| R46.htm | 5304 | 2021-08-02 16:08:17 |
| R47.htm | 18913 | 2021-08-02 16:08:17 |
| R5.htm | 75959 | 2021-08-02 16:08:17 |
| R6.htm | 83339 | 2021-08-02 16:08:17 |
| R7.htm | 8156 | 2021-08-02 16:08:17 |
| R8.htm | 14522 | 2021-08-02 16:08:17 |
| R9.htm | 11133 | 2021-08-02 16:08:17 |
| report.css | 2767 | 2021-08-02 16:08:17 |
| Show.js | 1085 | 2021-08-02 16:08:17 |