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| 0001558370-20-013305-index.html | 2020-11-09 13:23:45 | |
| 0001558370-20-013305.txt | 2020-11-09 13:23:45 | |
 0001558370-20-013305-xbrl.zip | 186943 | 2020-11-09 13:23:45 |
| bstc-20200930.xsd | 32118 | 2020-11-09 13:23:45 |
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| bstc-20200930xex32d1.htm | 8042 | 2020-11-09 13:23:45 |
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| FilingSummary.xml | 25619 | 2020-11-09 13:23:45 |
| Financial_Report.xlsx | 74887 | 2020-11-09 13:23:45 |
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| report.css | 2767 | 2020-11-09 13:23:45 |
| Show.js | 1085 | 2020-11-09 13:23:45 |