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|---|---|---|
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| 0000950170-22-009683-index.html | 2022-05-12 16:19:28 | |
| 0000950170-22-009683.txt | 2022-05-12 16:19:28 | |
 0000950170-22-009683-xbrl.zip | 316245 | 2022-05-12 16:19:28 |
| atha-20220331.htm | 2610694 | 2022-05-12 16:19:28 |
| atha-20220331.xsd | 50354 | 2022-05-12 16:19:28 |
| atha-20220331_cal.xml | 40981 | 2022-05-12 16:19:28 |
| atha-20220331_def.xml | 132374 | 2022-05-12 16:19:28 |
| atha-20220331_htm.xml | 1564023 | 2022-05-12 16:19:28 |
| atha-20220331_lab.xml | 386742 | 2022-05-12 16:19:28 |
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| atha-ex31_1.htm | 19162 | 2022-05-12 16:19:28 |
| atha-ex31_2.htm | 19022 | 2022-05-12 16:19:28 |
| atha-ex32_1.htm | 11286 | 2022-05-12 16:19:28 |
| atha-ex32_2.htm | 9753 | 2022-05-12 16:19:28 |
| FilingSummary.xml | 33795 | 2022-05-12 16:19:28 |
| Financial_Report.xlsx | 73169 | 2022-05-12 16:19:28 |
 img104317408_0.jpg | 74351 | 2022-05-12 16:19:28 |
| MetaLinks.json | 524014 | 2022-05-12 16:19:28 |
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| report.css | 2767 | 2022-05-12 16:19:28 |
| Show.js | 1085 | 2022-05-12 16:19:28 |