Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-25-059322-index-headers.html | 2025-04-28 16:15:15 | |
| 0000950170-25-059322-index.html | 2025-04-28 16:15:15 | |
| 0000950170-25-059322.txt | 2025-04-28 16:15:15 | |
 0000950170-25-059322-xbrl.zip | 634304 | 2025-04-28 16:15:15 |
| atra-20250428.htm | 1680661 | 2025-04-28 16:15:15 |
| atra-20250428.xsd | 15714 | 2025-04-28 16:15:15 |
| atra-20250428_htm.xml | 590612 | 2025-04-28 16:15:15 |
| FilingSummary.xml | 3518 | 2025-04-28 16:15:15 |
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 img122750870_1.jpg | 121478 | 2025-04-28 16:15:15 |
 img122750870_2.jpg | 331645 | 2025-04-28 16:15:15 |
 img122750870_3.jpg | 102329 | 2025-04-28 16:15:15 |
 img122750870_4.jpg | 102780 | 2025-04-28 16:15:15 |
| MetaLinks.json | 108273 | 2025-04-28 16:15:15 |
| R1.htm | 8940 | 2025-04-28 16:15:15 |
| R2.htm | 561110 | 2025-04-28 16:15:15 |
| R3.htm | 6789 | 2025-04-28 16:15:15 |
| R4.htm | 7017 | 2025-04-28 16:15:15 |
| report.css | 2767 | 2025-04-28 16:15:15 |
| Show.js | 1085 | 2025-04-28 16:15:15 |