Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-23-039797-index-headers.html | 2023-08-08 16:07:47 | |
| 0000950170-23-039797-index.html | 2023-08-08 16:07:47 | |
| 0000950170-23-039797.txt | 2023-08-08 16:07:47 | |
 0000950170-23-039797-xbrl.zip | 20906 | 2023-08-08 16:07:47 |
| atra-20230808.htm | 57920 | 2023-08-08 16:07:47 |
| atra-20230808.xsd | 2469 | 2023-08-08 16:07:47 |
| atra-20230808_htm.xml | 4892 | 2023-08-08 16:07:47 |
| atra-20230808_lab.xml | 14028 | 2023-08-08 16:07:47 |
| atra-20230808_pre.xml | 10290 | 2023-08-08 16:07:47 |
| atra-ex99_1.htm | 365308 | 2023-08-08 16:07:47 |
| FilingSummary.xml | 1738 | 2023-08-08 16:07:47 |
| Financial_Report.xlsx | 5794 | 2023-08-08 16:07:47 |
| MetaLinks.json | 18661 | 2023-08-08 16:07:47 |
| R1.htm | 41260 | 2023-08-08 16:07:47 |
| report.css | 2767 | 2023-08-08 16:07:47 |
| Show.js | 1084 | 2023-08-08 16:07:47 |