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| 0000779544-21-000016-index.html | 2021-05-18 16:21:23 | |
| 0000779544-21-000016.txt | 2021-05-18 16:21:23 | |
 0000779544-21-000016-xbrl.zip | 237287 | 2021-05-18 16:21:23 |
| arkr-20210403.htm | 1249457 | 2021-05-18 16:21:23 |
| arkr-20210403.xsd | 46739 | 2021-05-18 16:21:23 |
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| Financial_Report.xlsx | 84057 | 2021-05-18 16:21:23 |
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| q2202110-qexhibit311.htm | 10573 | 2021-05-18 16:21:23 |
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| report.css | 2767 | 2021-05-18 16:21:23 |
| Show.js | 1085 | 2021-05-18 16:21:23 |