Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000059255-23-000041-index-headers.html | 2023-05-04 16:18:30 | |
| 0000059255-23-000041-index.html | 2023-05-04 16:18:30 | |
| 0000059255-23-000041.txt | 2023-05-04 16:18:30 | |
 0000059255-23-000041-xbrl.zip | 17156 | 2023-05-04 16:18:30 |
| FilingSummary.xml | 2376 | 2023-05-04 16:18:30 |
| Financial_Report.xlsx | 6674 | 2023-05-04 16:18:30 |
| MetaLinks.json | 96926 | 2023-05-04 16:18:30 |
| R1.htm | 39602 | 2023-05-04 16:18:30 |
| R2.htm | 22667 | 2023-05-04 16:18:30 |
| report.css | 2767 | 2023-05-04 16:18:30 |
| Show.js | 1085 | 2023-05-04 16:18:30 |
| vhl-20230504.xsd | 3236 | 2023-05-04 16:18:30 |
| vhl-20230504x8k.htm | 51384 | 2023-05-04 16:18:30 |
| vhl-20230504x8k_htm.xml | 4778 | 2023-05-04 16:18:30 |
| vhl-20230504xex99d1.htm | 120720 | 2023-05-04 16:18:30 |
 vhl-20230504xex99d1001.jpg | 7147 | 2023-05-04 16:18:30 |
| vhl-20230504_lab.xml | 630 | 2023-05-04 16:18:30 |
| vhl-20230504_pre.xml | 10661 | 2023-05-04 16:18:30 |