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| 0000006955-19-000020-index.html | 2019-06-28 18:32:48 | |
| 0000006955-19-000020.txt | 2019-06-28 18:32:48 | |
 0000006955-19-000020-xbrl.zip | 287012 | 2019-06-28 18:32:48 |
| atu-20190531.xml | 3985326 | 2019-06-28 18:32:48 |
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| atu-2019531exhibit321.htm | 4617 | 2019-06-28 18:32:48 |
| atu-2019531exhibit322.htm | 4630 | 2019-06-28 18:32:48 |
| FilingSummary.xml | 37448 | 2019-06-28 18:32:48 |
| Financial_Report.xlsx | 95372 | 2019-06-28 18:32:48 |
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| report.css | 2767 | 2019-06-28 18:32:48 |
| Show.js | 1085 | 2019-06-28 18:32:48 |