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| 0001193125-22-054396-index.html | 2022-02-25 16:07:08 | |
| 0001193125-22-054396.txt | 2022-02-25 16:07:08 | |
 0001193125-22-054396-xbrl.zip | 202044 | 2022-02-25 16:07:08 |
| altu-20201231.xsd | 39727 | 2022-02-25 16:07:08 |
| altu-20201231_cal.xml | 26183 | 2022-02-25 16:07:08 |
| altu-20201231_def.xml | 247684 | 2022-02-25 16:07:08 |
| altu-20201231_lab.xml | 291673 | 2022-02-25 16:07:08 |
| altu-20201231_pre.xml | 287431 | 2022-02-25 16:07:08 |
| d227375d10ka.htm | 1242047 | 2022-02-25 16:07:08 |
| d227375d10ka_htm.xml | 626706 | 2022-02-25 16:07:08 |
| d227375dex311.htm | 10918 | 2022-02-25 16:07:08 |
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| d227375dex321.htm | 4462 | 2022-02-25 16:07:08 |
| d227375dex322.htm | 4483 | 2022-02-25 16:07:08 |
| FilingSummary.xml | 25216 | 2022-02-25 16:07:08 |
| Financial_Report.xlsx | 67341 | 2022-02-25 16:07:08 |
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| R1.htm | 80667 | 2022-02-25 16:07:08 |
| R10.htm | 26951 | 2022-02-25 16:07:08 |
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| R9.htm | 44411 | 2022-02-25 16:07:08 |
| report.css | 2767 | 2022-02-25 16:07:08 |
| Show.js | 1085 | 2022-02-25 16:07:08 |