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| 0000779544-20-000010-index.html | 2020-02-11 16:16:14 | |
| 0000779544-20-000010.txt | 2020-02-11 16:16:14 | |
 0000779544-20-000010-xbrl.zip | 162314 | 2020-02-11 16:16:14 |
| ark-20191228.htm | 707162 | 2020-02-11 16:16:14 |
| arkr-20191228.xml | 672552 | 2020-02-11 16:16:14 |
| arkr-20191228.xsd | 54971 | 2020-02-11 16:16:14 |
| arkr-20191228_cal.xml | 85622 | 2020-02-11 16:16:14 |
| arkr-20191228_def.xml | 172153 | 2020-02-11 16:16:14 |
| arkr-20191228_lab.xml | 593461 | 2020-02-11 16:16:14 |
| arkr-20191228_pre.xml | 319447 | 2020-02-11 16:16:14 |
| exhibit311.htm | 13268 | 2020-02-11 16:16:14 |
| exhibit312.htm | 13237 | 2020-02-11 16:16:14 |
| exhibit32.htm | 6873 | 2020-02-11 16:16:14 |
| FilingSummary.xml | 32332 | 2020-02-11 16:16:14 |
| Financial_Report.xlsx | 66653 | 2020-02-11 16:16:14 |
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| report.css | 2767 | 2020-02-11 16:16:14 |
| Show.js | 1085 | 2020-02-11 16:16:14 |