Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001104659-21-033789-index-headers.html | 2021-03-09 16:10:52 | |
| 0001104659-21-033789-index.html | 2021-03-09 16:10:52 | |
| 0001104659-21-033789.txt | 2021-03-09 16:10:52 | |
 0001104659-21-033789-xbrl.zip | 99632 | 2021-03-09 16:10:52 |
| bpth-20201231.xml | 1075518 | 2021-03-09 16:10:52 |
| bpth-20201231.xsd | 43767 | 2021-03-09 16:10:52 |
| bpth-20201231_cal.xml | 31210 | 2021-03-09 16:10:52 |
| bpth-20201231_def.xml | 96284 | 2021-03-09 16:10:52 |
| bpth-20201231_lab.xml | 316200 | 2021-03-09 16:10:52 |
| bpth-20201231_pre.xml | 258290 | 2021-03-09 16:10:52 |
| FilingSummary.xml | 29393 | 2021-03-09 16:10:52 |
| Financial_Report.xlsx | 67011 | 2021-03-09 16:10:52 |
| R1.htm | 40501 | 2021-03-09 16:10:52 |
| R10.htm | 5281 | 2021-03-09 16:10:52 |
| R11.htm | 46267 | 2021-03-09 16:10:52 |
| R12.htm | 5053 | 2021-03-09 16:10:52 |
| R13.htm | 5718 | 2021-03-09 16:10:52 |
| R14.htm | 13506 | 2021-03-09 16:10:52 |
| R15.htm | 157723 | 2021-03-09 16:10:52 |
| R16.htm | 67092 | 2021-03-09 16:10:52 |
| R17.htm | 6298 | 2021-03-09 16:10:52 |
| R18.htm | 66935 | 2021-03-09 16:10:52 |
| R19.htm | 6415 | 2021-03-09 16:10:52 |
| R2.htm | 66984 | 2021-03-09 16:10:52 |
| R20.htm | 92439 | 2021-03-09 16:10:52 |
| R21.htm | 7381 | 2021-03-09 16:10:52 |
| R22.htm | 49355 | 2021-03-09 16:10:52 |
| R23.htm | 45245 | 2021-03-09 16:10:52 |
| R24.htm | 155203 | 2021-03-09 16:10:52 |
| R25.htm | 68094 | 2021-03-09 16:10:52 |
| R26.htm | 66332 | 2021-03-09 16:10:52 |
| R27.htm | 87469 | 2021-03-09 16:10:52 |
| R28.htm | 5191 | 2021-03-09 16:10:52 |
| R29.htm | 36111 | 2021-03-09 16:10:52 |
| R3.htm | 18917 | 2021-03-09 16:10:52 |
| R30.htm | 6592 | 2021-03-09 16:10:52 |
| R31.htm | 12434 | 2021-03-09 16:10:52 |
| R32.htm | 25714 | 2021-03-09 16:10:52 |
| R33.htm | 14561 | 2021-03-09 16:10:52 |
| R34.htm | 13761 | 2021-03-09 16:10:52 |
| R35.htm | 57699 | 2021-03-09 16:10:52 |
| R36.htm | 11899 | 2021-03-09 16:10:52 |
| R37.htm | 46615 | 2021-03-09 16:10:52 |
| R38.htm | 27374 | 2021-03-09 16:10:52 |
| R39.htm | 26763 | 2021-03-09 16:10:52 |
| R4.htm | 30544 | 2021-03-09 16:10:52 |
| R40.htm | 15488 | 2021-03-09 16:10:52 |
| R41.htm | 11513 | 2021-03-09 16:10:52 |
| R42.htm | 9021 | 2021-03-09 16:10:52 |
| R43.htm | 16690 | 2021-03-09 16:10:52 |
| R44.htm | 25201 | 2021-03-09 16:10:52 |
| R45.htm | 12245 | 2021-03-09 16:10:52 |
| R46.htm | 28550 | 2021-03-09 16:10:52 |
| R47.htm | 30181 | 2021-03-09 16:10:52 |
| R48.htm | 25027 | 2021-03-09 16:10:52 |
| R49.htm | 31285 | 2021-03-09 16:10:52 |
| R5.htm | 48772 | 2021-03-09 16:10:52 |
| R6.htm | 29899 | 2021-03-09 16:10:52 |
| R7.htm | 9201 | 2021-03-09 16:10:52 |
| R8.htm | 18771 | 2021-03-09 16:10:52 |
| R9.htm | 5538 | 2021-03-09 16:10:52 |
| report.css | 2767 | 2021-03-09 16:10:52 |
| Show.js | 1085 | 2021-03-09 16:10:52 |
| tm211142d1_10k.htm | 1163258 | 2021-03-09 16:10:52 |
 tm211142d1_10kimg001.jpg | 9429 | 2021-03-09 16:10:52 |
 tm211142d1_10kimg002.jpg | 54023 | 2021-03-09 16:10:52 |
 tm211142d1_10kimg003.jpg | 31129 | 2021-03-09 16:10:52 |
 tm211142d1_10kimg005.jpg | 10858 | 2021-03-09 16:10:52 |
 tm211142d1_10ksp03img001.jpg | 16941 | 2021-03-09 16:10:52 |
| tm211142d1_ex23-1.htm | 3607 | 2021-03-09 16:10:52 |
| tm211142d1_ex23-2.htm | 2986 | 2021-03-09 16:10:52 |
| tm211142d1_ex31.htm | 8486 | 2021-03-09 16:10:52 |
| tm211142d1_ex32.htm | 4965 | 2021-03-09 16:10:52 |