Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001558370-20-004205-index-headers.html | 2020-04-23 15:40:54 | |
| 0001558370-20-004205-index.html | 2020-04-23 15:40:54 | |
| 0001558370-20-004205.txt | 2020-04-23 15:40:54 | |
 0001558370-20-004205-xbrl.zip | 270765 | 2020-04-23 15:40:54 |
| arch-20200331xex31d1.htm | 12487 | 2020-04-23 15:40:54 |
| arch-20200331xex31d2.htm | 12500 | 2020-04-23 15:40:54 |
| arch-20200331xex32d1.htm | 6619 | 2020-04-23 15:40:54 |
| arch-20200331xex32d2.htm | 6657 | 2020-04-23 15:40:54 |
| arch-20200331xex95.htm | 216958 | 2020-04-23 15:40:54 |
| arch-20200423.xsd | 59067 | 2020-04-23 15:40:54 |
| arch-20200423x10q.htm | 2270033 | 2020-04-23 15:40:54 |
 arch-20200423x10q002.jpg | 9114 | 2020-04-23 15:40:54 |
| arch-20200423x10q_htm.xml | 2069759 | 2020-04-23 15:40:54 |
| arch-20200423_cal.xml | 97123 | 2020-04-23 15:40:54 |
| arch-20200423_def.xml | 200464 | 2020-04-23 15:40:54 |
| arch-20200423_lab.xml | 565569 | 2020-04-23 15:40:54 |
| arch-20200423_pre.xml | 421111 | 2020-04-23 15:40:54 |
| FilingSummary.xml | 47997 | 2020-04-23 15:40:54 |
| Financial_Report.xlsx | 86351 | 2020-04-23 15:40:54 |
| MetaLinks.json | 660935 | 2020-04-23 15:40:54 |
| R1.htm | 53806 | 2020-04-23 15:40:54 |
| R10.htm | 9469 | 2020-04-23 15:40:54 |
| R11.htm | 8287 | 2020-04-23 15:40:54 |
| R12.htm | 5746 | 2020-04-23 15:40:54 |
| R13.htm | 5170 | 2020-04-23 15:40:54 |
| R14.htm | 82958 | 2020-04-23 15:40:54 |
| R15.htm | 16154 | 2020-04-23 15:40:54 |
| R16.htm | 96214 | 2020-04-23 15:40:54 |
| R17.htm | 138421 | 2020-04-23 15:40:54 |
| R18.htm | 22328 | 2020-04-23 15:40:54 |
| R19.htm | 56213 | 2020-04-23 15:40:54 |
| R2.htm | 77325 | 2020-04-23 15:40:54 |
| R20.htm | 27863 | 2020-04-23 15:40:54 |
| R21.htm | 47050 | 2020-04-23 15:40:54 |
| R22.htm | 17943 | 2020-04-23 15:40:54 |
| R23.htm | 28995 | 2020-04-23 15:40:54 |
| R24.htm | 32781 | 2020-04-23 15:40:54 |
| R25.htm | 5466 | 2020-04-23 15:40:54 |
| R26.htm | 111552 | 2020-04-23 15:40:54 |
| R27.htm | 70263 | 2020-04-23 15:40:54 |
| R28.htm | 62551 | 2020-04-23 15:40:54 |
| R29.htm | 4884 | 2020-04-23 15:40:54 |
| R3.htm | 32875 | 2020-04-23 15:40:54 |
| R30.htm | 12724 | 2020-04-23 15:40:54 |
| R31.htm | 83895 | 2020-04-23 15:40:54 |
| R32.htm | 16565 | 2020-04-23 15:40:54 |
| R33.htm | 93548 | 2020-04-23 15:40:54 |
| R34.htm | 137064 | 2020-04-23 15:40:54 |
| R35.htm | 21606 | 2020-04-23 15:40:54 |
| R36.htm | 40836 | 2020-04-23 15:40:54 |
| R37.htm | 27369 | 2020-04-23 15:40:54 |
| R38.htm | 43356 | 2020-04-23 15:40:54 |
| R39.htm | 16592 | 2020-04-23 15:40:54 |
| R4.htm | 79254 | 2020-04-23 15:40:54 |
| R40.htm | 26440 | 2020-04-23 15:40:54 |
| R41.htm | 33976 | 2020-04-23 15:40:54 |
| R42.htm | 111087 | 2020-04-23 15:40:54 |
| R43.htm | 67767 | 2020-04-23 15:40:54 |
| R44.htm | 63027 | 2020-04-23 15:40:54 |
| R45.htm | 10466 | 2020-04-23 15:40:54 |
| R46.htm | 15234 | 2020-04-23 15:40:54 |
| R47.htm | 7200 | 2020-04-23 15:40:54 |
| R48.htm | 21937 | 2020-04-23 15:40:54 |
| R49.htm | 32961 | 2020-04-23 15:40:54 |
| R5.htm | 13388 | 2020-04-23 15:40:54 |
| R50.htm | 11966 | 2020-04-23 15:40:54 |
| R51.htm | 25098 | 2020-04-23 15:40:54 |
| R52.htm | 8110 | 2020-04-23 15:40:54 |
| R53.htm | 26996 | 2020-04-23 15:40:54 |
| R54.htm | 8214 | 2020-04-23 15:40:54 |
| R55.htm | 34707 | 2020-04-23 15:40:54 |
| R56.htm | 9952 | 2020-04-23 15:40:54 |
| R57.htm | 37179 | 2020-04-23 15:40:54 |
| R58.htm | 19292 | 2020-04-23 15:40:54 |
| R59.htm | 20106 | 2020-04-23 15:40:54 |
| R6.htm | 81437 | 2020-04-23 15:40:54 |
| R60.htm | 105672 | 2020-04-23 15:40:54 |
| R61.htm | 11908 | 2020-04-23 15:40:54 |
| R62.htm | 22111 | 2020-04-23 15:40:54 |
| R63.htm | 22057 | 2020-04-23 15:40:54 |
| R64.htm | 11859 | 2020-04-23 15:40:54 |
| R65.htm | 8873 | 2020-04-23 15:40:54 |
| R66.htm | 17493 | 2020-04-23 15:40:54 |
| R67.htm | 24455 | 2020-04-23 15:40:54 |
| R68.htm | 24806 | 2020-04-23 15:40:54 |
| R69.htm | 37072 | 2020-04-23 15:40:54 |
| R7.htm | 24505 | 2020-04-23 15:40:54 |
| R70.htm | 28944 | 2020-04-23 15:40:54 |
| R71.htm | 27053 | 2020-04-23 15:40:54 |
| R72.htm | 10227 | 2020-04-23 15:40:54 |
| R73.htm | 13670 | 2020-04-23 15:40:54 |
| R74.htm | 11668 | 2020-04-23 15:40:54 |
| R75.htm | 46772 | 2020-04-23 15:40:54 |
| R8.htm | 7347 | 2020-04-23 15:40:54 |
| R9.htm | 6704 | 2020-04-23 15:40:54 |
| report.css | 2767 | 2020-04-23 15:40:54 |
| Show.js | 1085 | 2020-04-23 15:40:54 |