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 0001628280-21-011563-index-headers.html | 2021-06-02 21:11:26 | |
| 0001628280-21-011563-index.html | 2021-06-02 21:11:26 | |
| 0001628280-21-011563.txt | 2021-06-02 21:11:26 | |
 0001628280-21-011563-xbrl.zip | 26333 | 2021-06-02 21:11:26 |
| art-20201231.htm | 123381 | 2021-06-02 21:11:26 |
| art-20201231.xsd | 1927 | 2021-06-02 21:11:26 |
| art-20201231_htm.xml | 18112 | 2021-06-02 21:11:26 |
| art-20201231_lab.xml | 37476 | 2021-06-02 21:11:26 |
| art-20201231_pre.xml | 19728 | 2021-06-02 21:11:26 |
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| exhibit231q420201.htm | 5597 | 2021-06-02 21:11:26 |
| exhibit313q420.htm | 8373 | 2021-06-02 21:11:26 |
| exhibit314q420.htm | 8189 | 2021-06-02 21:11:26 |
| FilingSummary.xml | 1763 | 2021-06-02 21:11:26 |
| Financial_Report.xlsx | 6217 | 2021-06-02 21:11:26 |
| MetaLinks.json | 26146 | 2021-06-02 21:11:26 |
| R1.htm | 64554 | 2021-06-02 21:11:26 |
| report.css | 2767 | 2021-06-02 21:11:26 |
| Show.js | 1085 | 2021-06-02 21:11:26 |