Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001193125-21-355447-index-headers.html | 2021-12-13 16:34:06 | |
| 0001193125-21-355447-index.html | 2021-12-13 16:34:06 | |
| 0001193125-21-355447.txt | 2021-12-13 16:34:06 | |
 0001193125-21-355447-xbrl.zip | 72709 | 2021-12-13 16:34:06 |
| ath-20211208.xsd | 5751 | 2021-12-13 16:34:06 |
| ath-20211208_def.xml | 16385 | 2021-12-13 16:34:06 |
| ath-20211208_lab.xml | 28921 | 2021-12-13 16:34:06 |
| ath-20211208_pre.xml | 17613 | 2021-12-13 16:34:06 |
| d273280d8k.htm | 43271 | 2021-12-13 16:34:06 |
| d273280d8k_htm.xml | 12045 | 2021-12-13 16:34:06 |
| d273280dex11.htm | 157235 | 2021-12-13 16:34:06 |
| d273280dex42.htm | 103325 | 2021-12-13 16:34:06 |
| d273280dex51.htm | 18076 | 2021-12-13 16:34:06 |
| d273280dex52.htm | 14568 | 2021-12-13 16:34:06 |
| FilingSummary.xml | 1929 | 2021-12-13 16:34:06 |
| Financial_Report.xlsx | 6201 | 2021-12-13 16:34:06 |
 g273280g1213004018614.jpg | 2107 | 2021-12-13 16:34:06 |
| MetaLinks.json | 26098 | 2021-12-13 16:34:06 |
| R1.htm | 54987 | 2021-12-13 16:34:06 |
| report.css | 2767 | 2021-12-13 16:34:06 |
| Show.js | 1085 | 2021-12-13 16:34:06 |