Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-20-236340-index-headers.html | 2020-08-31 17:02:57 | |
| 0001193125-20-236340-index.html | 2020-08-31 17:02:57 | |
| 0001193125-20-236340.txt | 2020-08-31 17:02:57 | |
 0001193125-20-236340-xbrl.zip | 42725 | 2020-08-31 17:02:57 |
| bstc-20200831.xsd | 3070 | 2020-08-31 17:02:57 |
| bstc-20200831_lab.xml | 18139 | 2020-08-31 17:02:57 |
| bstc-20200831_pre.xml | 11408 | 2020-08-31 17:02:57 |
| d90221d8k.htm | 30702 | 2020-08-31 17:02:57 |
| d90221d8k_htm.xml | 3421 | 2020-08-31 17:02:57 |
| d90221dex11.htm | 151016 | 2020-08-31 17:02:57 |
| d90221dex51.htm | 9446 | 2020-08-31 17:02:57 |
| FilingSummary.xml | 1755 | 2020-08-31 17:02:57 |
| Financial_Report.xlsx | 5494 | 2020-08-31 17:02:57 |
 g90221g09n10.jpg | 904 | 2020-08-31 17:02:57 |
 g90221g13o97.jpg | 883 | 2020-08-31 17:02:57 |
 g90221g69o51.jpg | 5167 | 2020-08-31 17:02:57 |
| MetaLinks.json | 18830 | 2020-08-31 17:02:57 |
| R1.htm | 40186 | 2020-08-31 17:02:57 |
| report.css | 2767 | 2020-08-31 17:02:57 |
| Show.js | 1085 | 2020-08-31 17:02:57 |