Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001564590-22-006708-index-headers.html | 2022-02-24 16:14:55 | |
| 0001564590-22-006708-index.html | 2022-02-24 16:14:55 | |
| 0001564590-22-006708.txt | 2022-02-24 16:14:55 | |
 0001564590-22-006708-xbrl.zip | 334967 | 2022-02-24 16:14:55 |
| FilingSummary.xml | 40727 | 2022-02-24 16:14:55 |
| Financial_Report.xlsx | 96086 | 2022-02-24 16:14:55 |
| MetaLinks.json | 760453 | 2022-02-24 16:14:55 |
| pstv-10k_20211231.htm | 2600948 | 2022-02-24 16:14:55 |
| pstv-10k_20211231_htm.xml | 1516524 | 2022-02-24 16:14:55 |
| pstv-20211231.xsd | 67181 | 2022-02-24 16:14:55 |
| pstv-20211231_cal.xml | 70349 | 2022-02-24 16:14:55 |
| pstv-20211231_def.xml | 202409 | 2022-02-24 16:14:55 |
| pstv-20211231_lab.xml | 533792 | 2022-02-24 16:14:55 |
| pstv-20211231_pre.xml | 418890 | 2022-02-24 16:14:55 |
| pstv-ex1026_110.htm | 85806 | 2022-02-24 16:14:55 |
| pstv-ex102_69.htm | 397056 | 2022-02-24 16:14:55 |
| pstv-ex231_8.htm | 3881 | 2022-02-24 16:14:55 |
| pstv-ex311_9.htm | 11548 | 2022-02-24 16:14:55 |
| pstv-ex312_10.htm | 11397 | 2022-02-24 16:14:55 |
| pstv-ex321_7.htm | 11743 | 2022-02-24 16:14:55 |
| R1.htm | 70534 | 2022-02-24 16:14:55 |
| R10.htm | 54933 | 2022-02-24 16:14:55 |
| R11.htm | 24480 | 2022-02-24 16:14:55 |
| R12.htm | 82592 | 2022-02-24 16:14:55 |
| R13.htm | 127631 | 2022-02-24 16:14:55 |
| R14.htm | 89110 | 2022-02-24 16:14:55 |
| R15.htm | 132023 | 2022-02-24 16:14:55 |
| R16.htm | 6638 | 2022-02-24 16:14:55 |
| R17.htm | 9250 | 2022-02-24 16:14:55 |
| R18.htm | 25640 | 2022-02-24 16:14:55 |
| R19.htm | 95881 | 2022-02-24 16:14:55 |
| R2.htm | 89813 | 2022-02-24 16:14:55 |
| R20.htm | 8717 | 2022-02-24 16:14:55 |
| R21.htm | 5829 | 2022-02-24 16:14:55 |
| R22.htm | 5861 | 2022-02-24 16:14:55 |
| R23.htm | 76360 | 2022-02-24 16:14:55 |
| R24.htm | 49822 | 2022-02-24 16:14:55 |
| R25.htm | 23380 | 2022-02-24 16:14:55 |
| R26.htm | 84560 | 2022-02-24 16:14:55 |
| R27.htm | 114805 | 2022-02-24 16:14:55 |
| R28.htm | 81672 | 2022-02-24 16:14:55 |
| R29.htm | 125393 | 2022-02-24 16:14:55 |
| R3.htm | 19643 | 2022-02-24 16:14:55 |
| R30.htm | 94966 | 2022-02-24 16:14:55 |
| R31.htm | 48128 | 2022-02-24 16:14:55 |
| R32.htm | 59994 | 2022-02-24 16:14:55 |
| R33.htm | 14548 | 2022-02-24 16:14:55 |
| R34.htm | 19699 | 2022-02-24 16:14:55 |
| R35.htm | 11078 | 2022-02-24 16:14:55 |
| R36.htm | 12032 | 2022-02-24 16:14:55 |
| R37.htm | 11390 | 2022-02-24 16:14:55 |
| R38.htm | 14764 | 2022-02-24 16:14:55 |
| R39.htm | 5077 | 2022-02-24 16:14:55 |
| R4.htm | 48352 | 2022-02-24 16:14:55 |
| R40.htm | 23076 | 2022-02-24 16:14:55 |
| R41.htm | 42271 | 2022-02-24 16:14:55 |
| R42.htm | 27815 | 2022-02-24 16:14:55 |
| R43.htm | 21190 | 2022-02-24 16:14:55 |
| R44.htm | 20777 | 2022-02-24 16:14:55 |
| R45.htm | 60944 | 2022-02-24 16:14:55 |
| R46.htm | 20487 | 2022-02-24 16:14:55 |
| R47.htm | 9387 | 2022-02-24 16:14:55 |
| R48.htm | 12891 | 2022-02-24 16:14:55 |
| R49.htm | 39833 | 2022-02-24 16:14:55 |
| R5.htm | 48389 | 2022-02-24 16:14:55 |
| R50.htm | 27785 | 2022-02-24 16:14:55 |
| R51.htm | 32598 | 2022-02-24 16:14:55 |
| R52.htm | 9654 | 2022-02-24 16:14:55 |
| R53.htm | 7997 | 2022-02-24 16:14:55 |
| R54.htm | 17723 | 2022-02-24 16:14:55 |
| R55.htm | 26365 | 2022-02-24 16:14:55 |
| R56.htm | 38502 | 2022-02-24 16:14:55 |
| R57.htm | 67546 | 2022-02-24 16:14:55 |
| R58.htm | 40709 | 2022-02-24 16:14:55 |
| R59.htm | 35501 | 2022-02-24 16:14:55 |
| R6.htm | 4125 | 2022-02-24 16:14:55 |
| R60.htm | 13934 | 2022-02-24 16:14:55 |
| R61.htm | 9155 | 2022-02-24 16:14:55 |
| R62.htm | 15710 | 2022-02-24 16:14:55 |
| R7.htm | 87322 | 2022-02-24 16:14:55 |
| R8.htm | 10724 | 2022-02-24 16:14:55 |
| R9.htm | 34877 | 2022-02-24 16:14:55 |
| report.css | 2767 | 2022-02-24 16:14:55 |
| Show.js | 1085 | 2022-02-24 16:14:55 |