Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001558370-23-008111-index-headers.html | 2023-05-04 16:16:01 | |
| 0001558370-23-008111-index.html | 2023-05-04 16:16:01 | |
| 0001558370-23-008111.txt | 2023-05-04 16:16:01 | |
 0001558370-23-008111-xbrl.zip | 235409 | 2023-05-04 16:16:01 |
| FilingSummary.xml | 52658 | 2023-05-04 16:16:01 |
| Financial_Report.xlsx | 98156 | 2023-05-04 16:16:01 |
| MetaLinks.json | 790235 | 2023-05-04 16:16:01 |
| R1.htm | 53090 | 2023-05-04 16:16:01 |
| R10.htm | 35974 | 2023-05-04 16:16:01 |
| R11.htm | 40985 | 2023-05-04 16:16:01 |
| R12.htm | 27745 | 2023-05-04 16:16:01 |
| R13.htm | 33234 | 2023-05-04 16:16:01 |
| R14.htm | 41650 | 2023-05-04 16:16:01 |
| R15.htm | 28132 | 2023-05-04 16:16:01 |
| R16.htm | 66115 | 2023-05-04 16:16:01 |
| R17.htm | 23785 | 2023-05-04 16:16:01 |
| R18.htm | 26788 | 2023-05-04 16:16:01 |
| R19.htm | 46517 | 2023-05-04 16:16:01 |
| R2.htm | 153590 | 2023-05-04 16:16:01 |
| R20.htm | 40495 | 2023-05-04 16:16:01 |
| R21.htm | 54569 | 2023-05-04 16:16:01 |
| R22.htm | 44484 | 2023-05-04 16:16:01 |
| R23.htm | 35177 | 2023-05-04 16:16:01 |
| R24.htm | 9707 | 2023-05-04 16:16:01 |
| R25.htm | 68084 | 2023-05-04 16:16:01 |
| R26.htm | 31111 | 2023-05-04 16:16:01 |
| R27.htm | 36460 | 2023-05-04 16:16:01 |
| R28.htm | 38994 | 2023-05-04 16:16:01 |
| R29.htm | 27032 | 2023-05-04 16:16:01 |
| R3.htm | 80887 | 2023-05-04 16:16:01 |
| R30.htm | 27092 | 2023-05-04 16:16:01 |
| R31.htm | 34270 | 2023-05-04 16:16:01 |
| R32.htm | 41264 | 2023-05-04 16:16:01 |
| R33.htm | 27331 | 2023-05-04 16:16:01 |
| R34.htm | 62761 | 2023-05-04 16:16:01 |
| R35.htm | 19613 | 2023-05-04 16:16:01 |
| R36.htm | 25076 | 2023-05-04 16:16:01 |
| R37.htm | 41257 | 2023-05-04 16:16:01 |
| R38.htm | 24008 | 2023-05-04 16:16:01 |
| R39.htm | 52739 | 2023-05-04 16:16:01 |
| R4.htm | 38955 | 2023-05-04 16:16:01 |
| R40.htm | 18210 | 2023-05-04 16:16:01 |
| R41.htm | 32769 | 2023-05-04 16:16:01 |
| R42.htm | 11433 | 2023-05-04 16:16:01 |
| R43.htm | 13329 | 2023-05-04 16:16:01 |
| R44.htm | 19182 | 2023-05-04 16:16:01 |
| R45.htm | 52008 | 2023-05-04 16:16:01 |
| R46.htm | 29787 | 2023-05-04 16:16:01 |
| R47.htm | 10565 | 2023-05-04 16:16:01 |
| R48.htm | 19850 | 2023-05-04 16:16:01 |
| R49.htm | 14753 | 2023-05-04 16:16:01 |
| R5.htm | 39613 | 2023-05-04 16:16:01 |
| R50.htm | 5686 | 2023-05-04 16:16:01 |
| R51.htm | 21720 | 2023-05-04 16:16:01 |
| R52.htm | 23553 | 2023-05-04 16:16:01 |
| R53.htm | 15243 | 2023-05-04 16:16:01 |
| R54.htm | 16110 | 2023-05-04 16:16:01 |
| R55.htm | 11851 | 2023-05-04 16:16:01 |
| R56.htm | 4386 | 2023-05-04 16:16:01 |
| R57.htm | 4474 | 2023-05-04 16:16:01 |
| R58.htm | 65295 | 2023-05-04 16:16:01 |
| R59.htm | 25497 | 2023-05-04 16:16:01 |
| R6.htm | 84310 | 2023-05-04 16:16:01 |
| R60.htm | 31499 | 2023-05-04 16:16:01 |
| R61.htm | 22110 | 2023-05-04 16:16:01 |
| R62.htm | 6275 | 2023-05-04 16:16:01 |
| R63.htm | 17926 | 2023-05-04 16:16:01 |
| R64.htm | 16403 | 2023-05-04 16:16:01 |
| R65.htm | 4272 | 2023-05-04 16:16:01 |
| R66.htm | 44218 | 2023-05-04 16:16:01 |
| R67.htm | 5003 | 2023-05-04 16:16:01 |
| R68.htm | 6537 | 2023-05-04 16:16:01 |
| R69.htm | 9766 | 2023-05-04 16:16:01 |
| R7.htm | 8955 | 2023-05-04 16:16:01 |
| R70.htm | 9381 | 2023-05-04 16:16:01 |
| R71.htm | 6706 | 2023-05-04 16:16:01 |
| R72.htm | 17682 | 2023-05-04 16:16:01 |
| R73.htm | 16471 | 2023-05-04 16:16:01 |
| R74.htm | 5463 | 2023-05-04 16:16:01 |
| R75.htm | 24920 | 2023-05-04 16:16:01 |
| R76.htm | 10355 | 2023-05-04 16:16:01 |
| R77.htm | 37881 | 2023-05-04 16:16:01 |
| R78.htm | 16680 | 2023-05-04 16:16:01 |
| R79.htm | 24406 | 2023-05-04 16:16:01 |
| R8.htm | 72620 | 2023-05-04 16:16:01 |
| R80.htm | 8672 | 2023-05-04 16:16:01 |
| R9.htm | 31295 | 2023-05-04 16:16:01 |
| report.css | 2767 | 2023-05-04 16:16:01 |
| Show.js | 1085 | 2023-05-04 16:16:01 |
| vhl-20230331.xsd | 71743 | 2023-05-04 16:16:01 |
| vhl-20230331x10q.htm | 1820861 | 2023-05-04 16:16:01 |
| vhl-20230331x10q_htm.xml | 1565874 | 2023-05-04 16:16:01 |
| vhl-20230331xex31d1.htm | 14610 | 2023-05-04 16:16:01 |
| vhl-20230331xex31d2.htm | 14571 | 2023-05-04 16:16:01 |
| vhl-20230331xex32d1.htm | 5875 | 2023-05-04 16:16:01 |
| vhl-20230331_cal.xml | 87258 | 2023-05-04 16:16:01 |
| vhl-20230331_def.xml | 249944 | 2023-05-04 16:16:01 |
| vhl-20230331_lab.xml | 526937 | 2023-05-04 16:16:01 |
| vhl-20230331_pre.xml | 438770 | 2023-05-04 16:16:01 |