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| 0001564590-20-003571-index.html | 2020-02-06 06:11:26 | |
| 0001564590-20-003571.txt | 2020-02-06 06:11:26 | |
 0001564590-20-003571-xbrl.zip | 134043 | 2020-02-06 06:11:26 |
| bv-10q_20191231.htm | 1852195 | 2020-02-06 06:11:26 |
| bv-20191231.xml | 1771512 | 2020-02-06 06:11:26 |
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| FilingSummary.xml | 45587 | 2020-02-06 06:11:26 |
| Financial_Report.xlsx | 74971 | 2020-02-06 06:11:26 |
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| report.css | 2767 | 2020-02-06 06:11:26 |
| Show.js | 1085 | 2020-02-06 06:11:26 |