Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-21-004709-index-headers.html | 2021-11-17 06:36:10 | |
| 0000950170-21-004709-index.html | 2021-11-17 06:36:10 | |
| 0000950170-21-004709.txt | 2021-11-17 06:36:10 | |
 0000950170-21-004709-xbrl.zip | 45067 | 2021-11-17 06:36:10 |
| bv-20211117.htm | 61846 | 2021-11-17 06:36:10 |
| bv-20211117.xsd | 2435 | 2021-11-17 06:36:10 |
| bv-20211117_htm.xml | 4510 | 2021-11-17 06:36:10 |
| bv-20211117_lab.xml | 13563 | 2021-11-17 06:36:10 |
| bv-20211117_pre.xml | 10557 | 2021-11-17 06:36:10 |
| bv-ex99_1.htm | 1159971 | 2021-11-17 06:36:10 |
| FilingSummary.xml | 1646 | 2021-11-17 06:36:10 |
| Financial_Report.xlsx | 5651 | 2021-11-17 06:36:10 |
 img77028497_0.jpg | 6749 | 2021-11-17 06:36:10 |
 img77028497_1.jpg | 45728 | 2021-11-17 06:36:10 |
 img77028497_2.jpg | 43987 | 2021-11-17 06:36:10 |
| MetaLinks.json | 16906 | 2021-11-17 06:36:10 |
| R1.htm | 38591 | 2021-11-17 06:36:10 |
| report.css | 2767 | 2021-11-17 06:36:10 |
| Show.js | 1085 | 2021-11-17 06:36:10 |