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|---|---|---|
 0000950170-23-009724-index-headers.html | 2023-03-24 16:06:20 | |
| 0000950170-23-009724-index.html | 2023-03-24 16:06:20 | |
| 0000950170-23-009724.txt | 2023-03-24 16:06:20 | |
 0000950170-23-009724-xbrl.zip | 916636 | 2023-03-24 16:06:20 |
| atra-20230324.htm | 1967548 | 2023-03-24 16:06:20 |
| atra-20230324.xsd | 5606 | 2023-03-24 16:06:20 |
| atra-20230324_def.xml | 5776 | 2023-03-24 16:06:20 |
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 img120902863_1.jpg | 32199 | 2023-03-24 16:06:20 |
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| R1.htm | 8956 | 2023-03-24 16:06:20 |
| R2.htm | 342036 | 2023-03-24 16:06:20 |
| report.css | 2767 | 2023-03-24 16:06:20 |
| Show.js | 1085 | 2023-03-24 16:06:20 |