Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-288539-index-headers.html | 2020-11-09 08:14:02 | |
| 0001193125-20-288539-index.html | 2020-11-09 08:14:02 | |
| 0001193125-20-288539.txt | 2020-11-09 08:14:02 | |
 0001193125-20-288539-xbrl.zip | 18309 | 2020-11-09 08:14:02 |
| bstc-20201109.xsd | 3069 | 2020-11-09 08:14:02 |
| bstc-20201109_lab.xml | 18138 | 2020-11-09 08:14:02 |
| bstc-20201109_pre.xml | 11407 | 2020-11-09 08:14:02 |
| d798228d8k.htm | 25985 | 2020-11-09 08:14:02 |
| d798228d8k_htm.xml | 3423 | 2020-11-09 08:14:02 |
| d798228dex991.htm | 96566 | 2020-11-09 08:14:02 |
| FilingSummary.xml | 1727 | 2020-11-09 08:14:02 |
| Financial_Report.xlsx | 5497 | 2020-11-09 08:14:02 |
 g798228g1107065416695.jpg | 8440 | 2020-11-09 08:14:02 |
| MetaLinks.json | 18834 | 2020-11-09 08:14:02 |
| R1.htm | 40188 | 2020-11-09 08:14:02 |
| report.css | 2767 | 2020-11-09 08:14:02 |
| Show.js | 1085 | 2020-11-09 08:14:02 |