Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-23-009498-index-headers.html | 2023-03-23 16:15:37 | |
| 0000950170-23-009498-index.html | 2023-03-23 16:15:37 | |
| 0000950170-23-009498.txt | 2023-03-23 16:15:37 | |
 0000950170-23-009498-xbrl.zip | 1783852 | 2023-03-23 16:15:37 |
| atha-20221231.htm | 3596088 | 2023-03-23 16:15:37 |
| atha-20221231.xsd | 59967 | 2023-03-23 16:15:37 |
| atha-20221231_cal.xml | 49881 | 2023-03-23 16:15:37 |
| atha-20221231_def.xml | 174803 | 2023-03-23 16:15:37 |
| atha-20221231_htm.xml | 1995652 | 2023-03-23 16:15:37 |
| atha-20221231_lab.xml | 488426 | 2023-03-23 16:15:37 |
| atha-20221231_pre.xml | 344166 | 2023-03-23 16:15:37 |
| atha-ex10_10.htm | 60275 | 2023-03-23 16:15:37 |
| atha-ex10_8.htm | 299143 | 2023-03-23 16:15:37 |
| atha-ex23_1.htm | 6652 | 2023-03-23 16:15:37 |
| atha-ex31_1.htm | 19462 | 2023-03-23 16:15:37 |
| atha-ex31_2.htm | 19302 | 2023-03-23 16:15:37 |
| atha-ex32_1.htm | 12064 | 2023-03-23 16:15:37 |
| atha-ex32_2.htm | 11869 | 2023-03-23 16:15:37 |
| atha-ex4_3.htm | 89885 | 2023-03-23 16:15:37 |
| FilingSummary.xml | 38516 | 2023-03-23 16:15:37 |
| Financial_Report.xlsx | 92429 | 2023-03-23 16:15:37 |
 img104346238_0.jpg | 154086 | 2023-03-23 16:15:37 |
 img104346238_1.jpg | 124808 | 2023-03-23 16:15:37 |
 img104346238_10.jpg | 98516 | 2023-03-23 16:15:37 |
 img104346238_11.jpg | 17761 | 2023-03-23 16:15:37 |
 img104346238_12.jpg | 31104 | 2023-03-23 16:15:37 |
 img104346238_13.jpg | 27320 | 2023-03-23 16:15:37 |
 img104346238_14.jpg | 105080 | 2023-03-23 16:15:37 |
 img104346238_15.jpg | 25263 | 2023-03-23 16:15:37 |
 img104346238_16.jpg | 65150 | 2023-03-23 16:15:37 |
 img104346238_17.jpg | 124035 | 2023-03-23 16:15:37 |
 img104346238_18.jpg | 61602 | 2023-03-23 16:15:37 |
 img104346238_19.jpg | 55883 | 2023-03-23 16:15:37 |
 img104346238_2.jpg | 44215 | 2023-03-23 16:15:37 |
 img104346238_20.jpg | 27065 | 2023-03-23 16:15:37 |
 img104346238_21.jpg | 27951 | 2023-03-23 16:15:37 |
 img104346238_22.jpg | 17465 | 2023-03-23 16:15:37 |
 img104346238_23.jpg | 70594 | 2023-03-23 16:15:37 |
 img104346238_24.jpg | 55723 | 2023-03-23 16:15:37 |
 img104346238_25.jpg | 61117 | 2023-03-23 16:15:37 |
 img104346238_26.jpg | 154086 | 2023-03-23 16:15:37 |
 img104346238_3.jpg | 39562 | 2023-03-23 16:15:37 |
 img104346238_4.jpg | 69725 | 2023-03-23 16:15:37 |
 img104346238_5.jpg | 52392 | 2023-03-23 16:15:37 |
 img104346238_6.jpg | 94711 | 2023-03-23 16:15:37 |
 img104346238_7.jpg | 41972 | 2023-03-23 16:15:37 |
 img104346238_8.jpg | 13083 | 2023-03-23 16:15:37 |
 img104346238_9.jpg | 16090 | 2023-03-23 16:15:37 |
| MetaLinks.json | 740231 | 2023-03-23 16:15:37 |
| R1.htm | 72351 | 2023-03-23 16:15:37 |
| R10.htm | 41976 | 2023-03-23 16:15:37 |
| R11.htm | 27196 | 2023-03-23 16:15:37 |
| R12.htm | 15810 | 2023-03-23 16:15:37 |
| R13.htm | 69998 | 2023-03-23 16:15:37 |
| R14.htm | 40199 | 2023-03-23 16:15:37 |
| R15.htm | 196551 | 2023-03-23 16:15:37 |
| R16.htm | 169057 | 2023-03-23 16:15:37 |
| R17.htm | 7526 | 2023-03-23 16:15:37 |
| R18.htm | 27940 | 2023-03-23 16:15:37 |
| R19.htm | 112721 | 2023-03-23 16:15:37 |
| R2.htm | 90271 | 2023-03-23 16:15:37 |
| R20.htm | 22516 | 2023-03-23 16:15:37 |
| R21.htm | 226602 | 2023-03-23 16:15:37 |
| R22.htm | 39211 | 2023-03-23 16:15:37 |
| R23.htm | 26399 | 2023-03-23 16:15:37 |
| R24.htm | 33065 | 2023-03-23 16:15:37 |
| R25.htm | 26594 | 2023-03-23 16:15:37 |
| R26.htm | 178608 | 2023-03-23 16:15:37 |
| R27.htm | 159556 | 2023-03-23 16:15:37 |
| R28.htm | 27236 | 2023-03-23 16:15:37 |
| R29.htm | 28262 | 2023-03-23 16:15:37 |
| R3.htm | 10644 | 2023-03-23 16:15:37 |
| R30.htm | 11403 | 2023-03-23 16:15:37 |
| R31.htm | 52701 | 2023-03-23 16:15:37 |
| R32.htm | 51212 | 2023-03-23 16:15:37 |
| R33.htm | 10047 | 2023-03-23 16:15:37 |
| R34.htm | 18744 | 2023-03-23 16:15:37 |
| R35.htm | 4755 | 2023-03-23 16:15:37 |
| R36.htm | 10153 | 2023-03-23 16:15:37 |
| R37.htm | 28843 | 2023-03-23 16:15:37 |
| R38.htm | 48815 | 2023-03-23 16:15:37 |
| R39.htm | 15968 | 2023-03-23 16:15:37 |
| R4.htm | 54052 | 2023-03-23 16:15:37 |
| R40.htm | 6976 | 2023-03-23 16:15:37 |
| R41.htm | 11421 | 2023-03-23 16:15:37 |
| R42.htm | 17618 | 2023-03-23 16:15:37 |
| R43.htm | 9294 | 2023-03-23 16:15:37 |
| R44.htm | 58616 | 2023-03-23 16:15:37 |
| R45.htm | 9492 | 2023-03-23 16:15:37 |
| R46.htm | 11219 | 2023-03-23 16:15:37 |
| R47.htm | 45614 | 2023-03-23 16:15:37 |
| R48.htm | 26378 | 2023-03-23 16:15:37 |
| R49.htm | 23896 | 2023-03-23 16:15:37 |
| R5.htm | 50546 | 2023-03-23 16:15:37 |
| R50.htm | 19342 | 2023-03-23 16:15:37 |
| R51.htm | 17733 | 2023-03-23 16:15:37 |
| R52.htm | 30588 | 2023-03-23 16:15:37 |
| R53.htm | 25059 | 2023-03-23 16:15:37 |
| R54.htm | 9039 | 2023-03-23 16:15:37 |
| R55.htm | 6209 | 2023-03-23 16:15:37 |
| R56.htm | 12844 | 2023-03-23 16:15:37 |
| R6.htm | 68972 | 2023-03-23 16:15:37 |
| R7.htm | 17737 | 2023-03-23 16:15:37 |
| R8.htm | 70152 | 2023-03-23 16:15:37 |
| R9.htm | 236635 | 2023-03-23 16:15:37 |
| report.css | 2768 | 2023-03-23 16:15:37 |
| Show.js | 1086 | 2023-03-23 16:15:37 |