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| 0001477932-19-003696-index.html | 2019-06-25 14:32:31 | |
| 0001477932-19-003696.txt | 2019-06-25 14:32:31 | |
 0001477932-19-003696-xbrl.zip | 130046 | 2019-06-25 14:32:31 |
| bvtk-20190331.xml | 1264118 | 2019-06-25 14:32:31 |
| bvtk-20190331.xsd | 88373 | 2019-06-25 14:32:31 |
| bvtk-20190331_cal.xml | 48078 | 2019-06-25 14:32:31 |
| bvtk-20190331_def.xml | 257411 | 2019-06-25 14:32:31 |
| bvtk-20190331_lab.xml | 299025 | 2019-06-25 14:32:31 |
| bvtk-20190331_pre.xml | 321147 | 2019-06-25 14:32:31 |
| bvtk_10q.htm | 543977 | 2019-06-25 14:32:31 |
| bvtk_ex1021.htm | 19075 | 2019-06-25 14:32:31 |
| bvtk_ex1022.htm | 19114 | 2019-06-25 14:32:31 |
| bvtk_ex311.htm | 9894 | 2019-06-25 14:32:31 |
| bvtk_ex312.htm | 9869 | 2019-06-25 14:32:31 |
| bvtk_ex321.htm | 3593 | 2019-06-25 14:32:31 |
| bvtk_ex322.htm | 3590 | 2019-06-25 14:32:31 |
| FilingSummary.xml | 34113 | 2019-06-25 14:32:31 |
| Financial_Report.xlsx | 78661 | 2019-06-25 14:32:31 |
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| report.css | 2767 | 2019-06-25 14:32:31 |
| Show.js | 1085 | 2019-06-25 14:32:31 |