Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0000950170-23-002132-index-headers.html | 2023-02-08 16:02:30 | |
| 0000950170-23-002132-index.html | 2023-02-08 16:02:30 | |
| 0000950170-23-002132.txt | 2023-02-08 16:02:30 | |
 0000950170-23-002132-xbrl.zip | 24385 | 2023-02-08 16:02:30 |
| atra-20230203.htm | 65002 | 2023-02-08 16:02:30 |
| atra-20230203.xsd | 2909 | 2023-02-08 16:02:30 |
| atra-20230203_def.xml | 13497 | 2023-02-08 16:02:30 |
| atra-20230203_htm.xml | 4728 | 2023-02-08 16:02:30 |
| atra-20230203_lab.xml | 16077 | 2023-02-08 16:02:30 |
| atra-20230203_pre.xml | 13504 | 2023-02-08 16:02:30 |
| atra-ex99_1.htm | 362283 | 2023-02-08 16:02:30 |
| FilingSummary.xml | 1782 | 2023-02-08 16:02:30 |
| Financial_Report.xlsx | 5754 | 2023-02-08 16:02:30 |
| MetaLinks.json | 21556 | 2023-02-08 16:02:30 |
| R1.htm | 39907 | 2023-02-08 16:02:30 |
| report.css | 2767 | 2023-02-08 16:02:30 |
| Show.js | 1085 | 2023-02-08 16:02:30 |