Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001558370-21-009352-index-headers.html | 2021-07-27 16:40:47 | |
| 0001558370-21-009352-index.html | 2021-07-27 16:40:47 | |
| 0001558370-21-009352.txt | 2021-07-27 16:40:47 | |
 0001558370-21-009352-xbrl.zip | 326844 | 2021-07-27 16:40:47 |
| arch-20210630.xsd | 62304 | 2021-07-27 16:40:47 |
| arch-20210630ex10086455f.htm | 54878 | 2021-07-27 16:40:47 |
| arch-20210630ex31112a609.htm | 11282 | 2021-07-27 16:40:47 |
| arch-20210630ex3126ff542.htm | 11313 | 2021-07-27 16:40:47 |
| arch-20210630ex32129d069.htm | 6924 | 2021-07-27 16:40:47 |
| arch-20210630ex32203437a.htm | 6971 | 2021-07-27 16:40:47 |
| arch-20210630x10q.htm | 3141343 | 2021-07-27 16:40:47 |
 arch-20210630x10q002.jpg | 27136 | 2021-07-27 16:40:47 |
| arch-20210630x10q_htm.xml | 2880298 | 2021-07-27 16:40:47 |
| arch-20210630xex95.htm | 242376 | 2021-07-27 16:40:47 |
| arch-20210630_cal.xml | 99319 | 2021-07-27 16:40:47 |
| arch-20210630_def.xml | 199065 | 2021-07-27 16:40:47 |
| arch-20210630_lab.xml | 600169 | 2021-07-27 16:40:47 |
| arch-20210630_pre.xml | 435889 | 2021-07-27 16:40:47 |
| FilingSummary.xml | 49577 | 2021-07-27 16:40:47 |
| Financial_Report.xlsx | 107401 | 2021-07-27 16:40:47 |
| MetaLinks.json | 765449 | 2021-07-27 16:40:47 |
| R1.htm | 53802 | 2021-07-27 16:40:47 |
| R10.htm | 9328 | 2021-07-27 16:40:47 |
| R11.htm | 4932 | 2021-07-27 16:40:47 |
| R12.htm | 5586 | 2021-07-27 16:40:47 |
| R13.htm | 5359 | 2021-07-27 16:40:47 |
| R14.htm | 5155 | 2021-07-27 16:40:47 |
| R15.htm | 106502 | 2021-07-27 16:40:47 |
| R16.htm | 15810 | 2021-07-27 16:40:47 |
| R17.htm | 85830 | 2021-07-27 16:40:47 |
| R18.htm | 183712 | 2021-07-27 16:40:47 |
| R19.htm | 23495 | 2021-07-27 16:40:47 |
| R2.htm | 96926 | 2021-07-27 16:40:47 |
| R20.htm | 69452 | 2021-07-27 16:40:47 |
| R21.htm | 43708 | 2021-07-27 16:40:47 |
| R22.htm | 39079 | 2021-07-27 16:40:47 |
| R23.htm | 33747 | 2021-07-27 16:40:47 |
| R24.htm | 42879 | 2021-07-27 16:40:47 |
| R25.htm | 60106 | 2021-07-27 16:40:47 |
| R26.htm | 6107 | 2021-07-27 16:40:47 |
| R27.htm | 190399 | 2021-07-27 16:40:47 |
| R28.htm | 98290 | 2021-07-27 16:40:47 |
| R29.htm | 141814 | 2021-07-27 16:40:47 |
| R3.htm | 39666 | 2021-07-27 16:40:47 |
| R30.htm | 12889 | 2021-07-27 16:40:47 |
| R31.htm | 106677 | 2021-07-27 16:40:47 |
| R32.htm | 16030 | 2021-07-27 16:40:47 |
| R33.htm | 82864 | 2021-07-27 16:40:47 |
| R34.htm | 183209 | 2021-07-27 16:40:47 |
| R35.htm | 22549 | 2021-07-27 16:40:47 |
| R36.htm | 39926 | 2021-07-27 16:40:47 |
| R37.htm | 41171 | 2021-07-27 16:40:47 |
| R38.htm | 32222 | 2021-07-27 16:40:47 |
| R39.htm | 28995 | 2021-07-27 16:40:47 |
| R4.htm | 94268 | 2021-07-27 16:40:47 |
| R40.htm | 40554 | 2021-07-27 16:40:47 |
| R41.htm | 57153 | 2021-07-27 16:40:47 |
| R42.htm | 184742 | 2021-07-27 16:40:47 |
| R43.htm | 92791 | 2021-07-27 16:40:47 |
| R44.htm | 143358 | 2021-07-27 16:40:47 |
| R45.htm | 7150 | 2021-07-27 16:40:47 |
| R46.htm | 13505 | 2021-07-27 16:40:47 |
| R47.htm | 9601 | 2021-07-27 16:40:47 |
| R48.htm | 13793 | 2021-07-27 16:40:47 |
| R49.htm | 24576 | 2021-07-27 16:40:47 |
| R5.htm | 13398 | 2021-07-27 16:40:47 |
| R50.htm | 49581 | 2021-07-27 16:40:47 |
| R51.htm | 11436 | 2021-07-27 16:40:47 |
| R52.htm | 18721 | 2021-07-27 16:40:47 |
| R53.htm | 8115 | 2021-07-27 16:40:47 |
| R54.htm | 19026 | 2021-07-27 16:40:47 |
| R55.htm | 12577 | 2021-07-27 16:40:47 |
| R56.htm | 34083 | 2021-07-27 16:40:47 |
| R57.htm | 9957 | 2021-07-27 16:40:47 |
| R58.htm | 40460 | 2021-07-27 16:40:47 |
| R59.htm | 19313 | 2021-07-27 16:40:47 |
| R6.htm | 93605 | 2021-07-27 16:40:47 |
| R60.htm | 24904 | 2021-07-27 16:40:47 |
| R61.htm | 194461 | 2021-07-27 16:40:47 |
| R62.htm | 7322 | 2021-07-27 16:40:47 |
| R63.htm | 22254 | 2021-07-27 16:40:47 |
| R64.htm | 21679 | 2021-07-27 16:40:47 |
| R65.htm | 4351 | 2021-07-27 16:40:47 |
| R66.htm | 21106 | 2021-07-27 16:40:47 |
| R67.htm | 29420 | 2021-07-27 16:40:47 |
| R68.htm | 29160 | 2021-07-27 16:40:47 |
| R69.htm | 43386 | 2021-07-27 16:40:47 |
| R7.htm | 38278 | 2021-07-27 16:40:47 |
| R70.htm | 41007 | 2021-07-27 16:40:47 |
| R71.htm | 28610 | 2021-07-27 16:40:47 |
| R72.htm | 10232 | 2021-07-27 16:40:47 |
| R73.htm | 7548 | 2021-07-27 16:40:47 |
| R74.htm | 31359 | 2021-07-27 16:40:47 |
| R75.htm | 11280 | 2021-07-27 16:40:47 |
| R76.htm | 11360 | 2021-07-27 16:40:47 |
| R77.htm | 37741 | 2021-07-27 16:40:47 |
| R8.htm | 5410 | 2021-07-27 16:40:47 |
| R9.htm | 6774 | 2021-07-27 16:40:47 |
| report.css | 2767 | 2021-07-27 16:40:47 |
| Show.js | 1085 | 2021-07-27 16:40:47 |