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| 0001564590-14-005463-index.html | 2014-11-12 06:36:53 | |
| 0001564590-14-005463.txt | 2014-11-12 06:36:53 | |
 0001564590-14-005463-xbrl.zip | 141329 | 2014-11-12 06:36:53 |
| atra-10q_20140930.htm | 2018882 | 2014-11-12 06:36:53 |
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| atra-ex321_20140930221.htm | 7750 | 2014-11-12 06:36:53 |
| FilingSummary.xml | 23414 | 2014-11-12 06:36:53 |
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| report.css | 2740 | 2014-11-12 06:36:53 |
| Show.js | 1410 | 2014-11-12 06:36:53 |