Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001626199-20-000057-index-headers.html | 2020-11-12 16:10:09 | |
| 0001626199-20-000057-index.html | 2020-11-12 16:10:09 | |
| 0001626199-20-000057.txt | 2020-11-12 16:10:09 | |
 0001626199-20-000057-xbrl.zip | 261229 | 2020-11-12 16:10:09 |
| alpn-20200930.htm | 1867701 | 2020-11-12 16:10:09 |
| alpn-20200930.xsd | 33608 | 2020-11-12 16:10:09 |
| alpn-20200930_cal.xml | 62583 | 2020-11-12 16:10:09 |
| alpn-20200930_def.xml | 136731 | 2020-11-12 16:10:09 |
| alpn-20200930_htm.xml | 669485 | 2020-11-12 16:10:09 |
| alpn-20200930_lab.xml | 417606 | 2020-11-12 16:10:09 |
| alpn-20200930_pre.xml | 245057 | 2020-11-12 16:10:09 |
| alpn-ex31120200930.htm | 9047 | 2020-11-12 16:10:09 |
| alpn-ex31220200930.htm | 9022 | 2020-11-12 16:10:09 |
| alpn-ex32120200930.htm | 6169 | 2020-11-12 16:10:09 |
| alpn-ex32220200930.htm | 6375 | 2020-11-12 16:10:09 |
| FilingSummary.xml | 24192 | 2020-11-12 16:10:09 |
| Financial_Report.xlsx | 61437 | 2020-11-12 16:10:09 |
| MetaLinks.json | 441043 | 2020-11-12 16:10:09 |
| R1.htm | 54052 | 2020-11-12 16:10:09 |
| R10.htm | 24850 | 2020-11-12 16:10:09 |
| R11.htm | 29320 | 2020-11-12 16:10:09 |
| R12.htm | 21908 | 2020-11-12 16:10:09 |
| R13.htm | 18818 | 2020-11-12 16:10:09 |
| R14.htm | 16358 | 2020-11-12 16:10:09 |
| R15.htm | 29311 | 2020-11-12 16:10:09 |
| R16.htm | 8351 | 2020-11-12 16:10:09 |
| R17.htm | 46265 | 2020-11-12 16:10:09 |
| R18.htm | 10535 | 2020-11-12 16:10:09 |
| R19.htm | 24504 | 2020-11-12 16:10:09 |
| R2.htm | 83959 | 2020-11-12 16:10:09 |
| R20.htm | 24952 | 2020-11-12 16:10:09 |
| R21.htm | 23878 | 2020-11-12 16:10:09 |
| R22.htm | 9525 | 2020-11-12 16:10:09 |
| R23.htm | 22290 | 2020-11-12 16:10:09 |
| R24.htm | 5426 | 2020-11-12 16:10:09 |
| R25.htm | 6962 | 2020-11-12 16:10:09 |
| R26.htm | 10185 | 2020-11-12 16:10:09 |
| R27.htm | 21751 | 2020-11-12 16:10:09 |
| R28.htm | 4708 | 2020-11-12 16:10:09 |
| R29.htm | 5001 | 2020-11-12 16:10:09 |
| R3.htm | 13099 | 2020-11-12 16:10:09 |
| R30.htm | 29461 | 2020-11-12 16:10:09 |
| R31.htm | 15364 | 2020-11-12 16:10:09 |
| R32.htm | 14552 | 2020-11-12 16:10:09 |
| R33.htm | 95036 | 2020-11-12 16:10:09 |
| R34.htm | 14795 | 2020-11-12 16:10:09 |
| R35.htm | 37499 | 2020-11-12 16:10:09 |
| R36.htm | 62956 | 2020-11-12 16:10:09 |
| R37.htm | 14694 | 2020-11-12 16:10:09 |
| R38.htm | 4393 | 2020-11-12 16:10:09 |
| R4.htm | 61166 | 2020-11-12 16:10:09 |
| R5.htm | 90893 | 2020-11-12 16:10:09 |
| R6.htm | 76940 | 2020-11-12 16:10:09 |
| R7.htm | 6685 | 2020-11-12 16:10:09 |
| R8.htm | 22299 | 2020-11-12 16:10:09 |
| R9.htm | 11888 | 2020-11-12 16:10:09 |
| report.css | 2767 | 2020-11-12 16:10:09 |
| Show.js | 1085 | 2020-11-12 16:10:09 |