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| atra-20250331.htm | 2696623 | 2025-05-15 08:45:25 |
| atra-20250331.xsd | 1386531 | 2025-05-15 08:45:25 |
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| atra-ex10_2.htm | 113426 | 2025-05-15 08:45:25 |
| atra-ex31_1.htm | 15392 | 2025-05-15 08:45:25 |
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| atra-ex32_1.htm | 11239 | 2025-05-15 08:45:25 |
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| Financial_Report.xlsx | 110071 | 2025-05-15 08:45:25 |
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| report.css | 2767 | 2025-05-15 08:45:25 |
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