Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000059255-23-000003-index-headers.html | 2023-03-02 16:18:19 | |
| 0000059255-23-000003-index.html | 2023-03-02 16:18:19 | |
| 0000059255-23-000003.txt | 2023-03-02 16:18:19 | |
 0000059255-23-000003-xbrl.zip | 10097 | 2023-03-02 16:18:19 |
| FilingSummary.xml | 2376 | 2023-03-02 16:18:19 |
| Financial_Report.xlsx | 6675 | 2023-03-02 16:18:19 |
| MetaLinks.json | 96926 | 2023-03-02 16:18:19 |
| R1.htm | 39604 | 2023-03-02 16:18:19 |
| R2.htm | 22668 | 2023-03-02 16:18:19 |
| report.css | 2767 | 2023-03-02 16:18:19 |
| Show.js | 1085 | 2023-03-02 16:18:19 |
| vhl-20230302.xsd | 3236 | 2023-03-02 16:18:19 |
| vhl-20230302x8k.htm | 50683 | 2023-03-02 16:18:19 |
| vhl-20230302x8k_htm.xml | 4778 | 2023-03-02 16:18:19 |
| vhl-20230302xex99d1.htm | 4982 | 2023-03-02 16:18:19 |
 vhl-20230302xex99d1001.jpg | 6069 | 2023-03-02 16:18:19 |
| vhl-20230302_lab.xml | 630 | 2023-03-02 16:18:19 |
| vhl-20230302_pre.xml | 10661 | 2023-03-02 16:18:19 |