Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001099910-19-000091-index-headers.html | 2019-11-14 16:22:32 | |
| 0001099910-19-000091-index.html | 2019-11-14 16:22:32 | |
| 0001099910-19-000091.txt | 2019-11-14 16:22:32 | |
 0001099910-19-000091-xbrl.zip | 70894 | 2019-11-14 16:22:32 |
| evtn-20190930.xml | 347563 | 2019-11-14 16:22:32 |
| evtn-20190930.xsd | 24373 | 2019-11-14 16:22:32 |
| evtn-20190930_cal.xml | 45305 | 2019-11-14 16:22:32 |
| evtn-20190930_def.xml | 69464 | 2019-11-14 16:22:32 |
| evtn-20190930_lab.xml | 209031 | 2019-11-14 16:22:32 |
| evtn-20190930_pre.xml | 162695 | 2019-11-14 16:22:32 |
| evtn_10q.htm | 414752 | 2019-11-14 16:22:32 |
| ex31-1.htm | 10214 | 2019-11-14 16:22:32 |
| ex31-2.htm | 9494 | 2019-11-14 16:22:32 |
| ex32-1.htm | 4690 | 2019-11-14 16:22:32 |
| FilingSummary.xml | 22489 | 2019-11-14 16:22:32 |
| Financial_Report.xlsx | 45471 | 2019-11-14 16:22:32 |
| R1.htm | 34503 | 2019-11-14 16:22:32 |
| R10.htm | 7279 | 2019-11-14 16:22:32 |
| R11.htm | 14719 | 2019-11-14 16:22:32 |
| R12.htm | 18641 | 2019-11-14 16:22:32 |
| R13.htm | 13923 | 2019-11-14 16:22:32 |
| R14.htm | 45752 | 2019-11-14 16:22:32 |
| R15.htm | 6825 | 2019-11-14 16:22:32 |
| R16.htm | 81612 | 2019-11-14 16:22:32 |
| R17.htm | 11185 | 2019-11-14 16:22:32 |
| R18.htm | 12958 | 2019-11-14 16:22:32 |
| R19.htm | 15404 | 2019-11-14 16:22:32 |
| R2.htm | 70860 | 2019-11-14 16:22:32 |
| R20.htm | 40009 | 2019-11-14 16:22:32 |
| R21.htm | 4643 | 2019-11-14 16:22:32 |
| R22.htm | 12973 | 2019-11-14 16:22:32 |
| R23.htm | 10760 | 2019-11-14 16:22:32 |
| R24.htm | 18624 | 2019-11-14 16:22:32 |
| R25.htm | 21961 | 2019-11-14 16:22:32 |
| R26.htm | 13824 | 2019-11-14 16:22:32 |
| R27.htm | 7899 | 2019-11-14 16:22:32 |
| R28.htm | 30337 | 2019-11-14 16:22:32 |
| R29.htm | 16467 | 2019-11-14 16:22:32 |
| R3.htm | 10723 | 2019-11-14 16:22:32 |
| R30.htm | 4797 | 2019-11-14 16:22:32 |
| R31.htm | 20927 | 2019-11-14 16:22:32 |
| R32.htm | 10027 | 2019-11-14 16:22:32 |
| R33.htm | 6731 | 2019-11-14 16:22:32 |
| R34.htm | 9675 | 2019-11-14 16:22:32 |
| R35.htm | 6151 | 2019-11-14 16:22:32 |
| R36.htm | 19207 | 2019-11-14 16:22:32 |
| R37.htm | 17380 | 2019-11-14 16:22:32 |
| R38.htm | 14517 | 2019-11-14 16:22:32 |
| R4.htm | 52622 | 2019-11-14 16:22:32 |
| R5.htm | 25760 | 2019-11-14 16:22:32 |
| R6.htm | 55268 | 2019-11-14 16:22:32 |
| R7.htm | 7586 | 2019-11-14 16:22:32 |
| R8.htm | 8697 | 2019-11-14 16:22:32 |
| R9.htm | 40268 | 2019-11-14 16:22:32 |
| report.css | 2767 | 2019-11-14 16:22:32 |
| Show.js | 1085 | 2019-11-14 16:22:32 |