Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000059255-23-000067-index-headers.html | 2023-11-02 16:19:31 | |
| 0000059255-23-000067-index.html | 2023-11-02 16:19:31 | |
| 0000059255-23-000067.txt | 2023-11-02 16:19:31 | |
 0000059255-23-000067-xbrl.zip | 40946 | 2023-11-02 16:19:31 |
| FilingSummary.xml | 2135 | 2023-11-02 16:19:31 |
| Financial_Report.xlsx | 6703 | 2023-11-02 16:19:31 |
| MetaLinks.json | 97434 | 2023-11-02 16:19:31 |
| R1.htm | 41121 | 2023-11-02 16:19:31 |
| R2.htm | 22669 | 2023-11-02 16:19:31 |
| report.css | 2767 | 2023-11-02 16:19:31 |
| Show.js | 1085 | 2023-11-02 16:19:31 |
| vhl-20231102.xsd | 3241 | 2023-11-02 16:19:31 |
| vhl-20231102x8k.htm | 64840 | 2023-11-02 16:19:31 |
| vhl-20231102x8k_htm.xml | 5014 | 2023-11-02 16:19:31 |
| vhl-20231102xex3d1.htm | 254499 | 2023-11-02 16:19:31 |
 vhl-20231102xex3d1001.jpg | 3263 | 2023-11-02 16:19:31 |
| vhl-20231102xex99d1.htm | 4972 | 2023-11-02 16:19:31 |
 vhl-20231102xex99d1001.jpg | 6069 | 2023-11-02 16:19:31 |
| vhl-20231102_lab.xml | 635 | 2023-11-02 16:19:31 |
| vhl-20231102_pre.xml | 11061 | 2023-11-02 16:19:31 |