Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-22-013232-index-headers.html | 2022-07-27 17:01:54 | |
| 0000950170-22-013232-index.html | 2022-07-27 17:01:54 | |
| 0000950170-22-013232.txt | 2022-07-27 17:01:54 | |
 0000950170-22-013232-xbrl.zip | 320632 | 2022-07-27 17:01:54 |
| drtt-20220630.htm | 3345202 | 2022-07-27 17:01:54 |
| drtt-20220630.xsd | 51596 | 2022-07-27 17:01:54 |
| drtt-20220630_cal.xml | 45783 | 2022-07-27 17:01:54 |
| drtt-20220630_def.xml | 177908 | 2022-07-27 17:01:54 |
| drtt-20220630_htm.xml | 2202516 | 2022-07-27 17:01:54 |
| drtt-20220630_lab.xml | 408584 | 2022-07-27 17:01:54 |
| drtt-20220630_pre.xml | 301863 | 2022-07-27 17:01:54 |
| drtt-ex10_2.htm | 127134 | 2022-07-27 17:01:54 |
| drtt-ex10_3.htm | 722195 | 2022-07-27 17:01:54 |
| drtt-ex10_4.htm | 233526 | 2022-07-27 17:01:54 |
| drtt-ex10_5.htm | 222273 | 2022-07-27 17:01:54 |
| drtt-ex31_1.htm | 21271 | 2022-07-27 17:01:54 |
| drtt-ex31_2.htm | 21433 | 2022-07-27 17:01:54 |
| drtt-ex32_1.htm | 12029 | 2022-07-27 17:01:54 |
| drtt-ex32_2.htm | 12041 | 2022-07-27 17:01:54 |
| FilingSummary.xml | 35636 | 2022-07-27 17:01:54 |
| Financial_Report.xlsx | 83220 | 2022-07-27 17:01:54 |
 img231763031_0.jpg | 66238 | 2022-07-27 17:01:54 |
 img231763031_1.jpg | 57609 | 2022-07-27 17:01:54 |
| MetaLinks.json | 594675 | 2022-07-27 17:01:54 |
| R1.htm | 53861 | 2022-07-27 17:01:54 |
| R10.htm | 14246 | 2022-07-27 17:01:54 |
| R11.htm | 19227 | 2022-07-27 17:01:54 |
| R12.htm | 16398 | 2022-07-27 17:01:54 |
| R13.htm | 18882 | 2022-07-27 17:01:54 |
| R14.htm | 53681 | 2022-07-27 17:01:54 |
| R15.htm | 57982 | 2022-07-27 17:01:54 |
| R16.htm | 189968 | 2022-07-27 17:01:54 |
| R17.htm | 344466 | 2022-07-27 17:01:54 |
| R18.htm | 194047 | 2022-07-27 17:01:54 |
| R19.htm | 71039 | 2022-07-27 17:01:54 |
| R2.htm | 93359 | 2022-07-27 17:01:54 |
| R20.htm | 8651 | 2022-07-27 17:01:54 |
| R21.htm | 9296 | 2022-07-27 17:01:54 |
| R22.htm | 12573 | 2022-07-27 17:01:54 |
| R23.htm | 45590 | 2022-07-27 17:01:54 |
| R24.htm | 57317 | 2022-07-27 17:01:54 |
| R25.htm | 162073 | 2022-07-27 17:01:54 |
| R26.htm | 327478 | 2022-07-27 17:01:54 |
| R27.htm | 188419 | 2022-07-27 17:01:54 |
| R28.htm | 65731 | 2022-07-27 17:01:54 |
| R29.htm | 31512 | 2022-07-27 17:01:54 |
| R3.htm | 13446 | 2022-07-27 17:01:54 |
| R30.htm | 15933 | 2022-07-27 17:01:54 |
| R31.htm | 27730 | 2022-07-27 17:01:54 |
| R32.htm | 31539 | 2022-07-27 17:01:54 |
| R33.htm | 27121 | 2022-07-27 17:01:54 |
| R34.htm | 19103 | 2022-07-27 17:01:54 |
| R35.htm | 11220 | 2022-07-27 17:01:54 |
| R36.htm | 4023 | 2022-07-27 17:01:54 |
| R37.htm | 9242 | 2022-07-27 17:01:54 |
| R38.htm | 34447 | 2022-07-27 17:01:54 |
| R39.htm | 86139 | 2022-07-27 17:01:54 |
| R4.htm | 110229 | 2022-07-27 17:01:54 |
| R40.htm | 47689 | 2022-07-27 17:01:54 |
| R41.htm | 9906 | 2022-07-27 17:01:54 |
| R42.htm | 28774 | 2022-07-27 17:01:54 |
| R43.htm | 17356 | 2022-07-27 17:01:54 |
| R44.htm | 19221 | 2022-07-27 17:01:54 |
| R45.htm | 30979 | 2022-07-27 17:01:54 |
| R46.htm | 22937 | 2022-07-27 17:01:54 |
| R47.htm | 16573 | 2022-07-27 17:01:54 |
| R48.htm | 8813 | 2022-07-27 17:01:54 |
| R49.htm | 4613 | 2022-07-27 17:01:54 |
| R5.htm | 21101 | 2022-07-27 17:01:54 |
| R50.htm | 27424 | 2022-07-27 17:01:54 |
| R51.htm | 8478 | 2022-07-27 17:01:54 |
| R52.htm | 16591 | 2022-07-27 17:01:54 |
| R53.htm | 8795 | 2022-07-27 17:01:54 |
| R54.htm | 4393 | 2022-07-27 17:01:54 |
| R55.htm | 15343 | 2022-07-27 17:01:54 |
| R6.htm | 52165 | 2022-07-27 17:01:54 |
| R7.htm | 91296 | 2022-07-27 17:01:54 |
| R8.htm | 11541 | 2022-07-27 17:01:54 |
| R9.htm | 7967 | 2022-07-27 17:01:54 |
| report.css | 2767 | 2022-07-27 17:01:54 |
| Show.js | 1085 | 2022-07-27 17:01:54 |