Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001699136-22-000011-index-headers.html | 2022-02-28 15:42:49 | |
| 0001699136-22-000011-index.html | 2022-02-28 15:42:49 | |
| 0001699136-22-000011.txt | 2022-02-28 15:42:49 | |
 0001699136-22-000011-xbrl.zip | 879171 | 2022-02-28 15:42:49 |
| a20211231-exhibit1011.htm | 7011 | 2022-02-28 15:42:49 |
| a20211231-exhibit1026.htm | 68781 | 2022-02-28 15:42:49 |
| a20211231-exhibit211.htm | 6446 | 2022-02-28 15:42:49 |
| a20211231-exhibit231.htm | 2758 | 2022-02-28 15:42:49 |
| a20211231-exhibit311.htm | 10370 | 2022-02-28 15:42:49 |
| a20211231-exhibit312.htm | 10385 | 2022-02-28 15:42:49 |
| a20211231-exhibit321.htm | 4826 | 2022-02-28 15:42:49 |
| a20211231-exhibit322.htm | 4962 | 2022-02-28 15:42:49 |
| FilingSummary.xml | 43914 | 2022-02-28 15:42:49 |
| Financial_Report.xlsx | 107708 | 2022-02-28 15:42:49 |
| MetaLinks.json | 754388 | 2022-02-28 15:42:49 |
| R1.htm | 68651 | 2022-02-28 15:42:49 |
| R10.htm | 8565 | 2022-02-28 15:42:49 |
| R11.htm | 106208 | 2022-02-28 15:42:49 |
| R12.htm | 11611 | 2022-02-28 15:42:49 |
| R13.htm | 26425 | 2022-02-28 15:42:49 |
| R14.htm | 76105 | 2022-02-28 15:42:49 |
| R15.htm | 23838 | 2022-02-28 15:42:49 |
| R16.htm | 19125 | 2022-02-28 15:42:49 |
| R17.htm | 151133 | 2022-02-28 15:42:49 |
| R18.htm | 8132 | 2022-02-28 15:42:49 |
| R19.htm | 29981 | 2022-02-28 15:42:49 |
| R2.htm | 7877 | 2022-02-28 15:42:49 |
| R20.htm | 8176 | 2022-02-28 15:42:49 |
| R21.htm | 5572 | 2022-02-28 15:42:49 |
| R22.htm | 27016 | 2022-02-28 15:42:49 |
| R23.htm | 17391 | 2022-02-28 15:42:49 |
| R24.htm | 153389 | 2022-02-28 15:42:49 |
| R25.htm | 79682 | 2022-02-28 15:42:49 |
| R26.htm | 12635 | 2022-02-28 15:42:49 |
| R27.htm | 17178 | 2022-02-28 15:42:49 |
| R28.htm | 75507 | 2022-02-28 15:42:49 |
| R29.htm | 21180 | 2022-02-28 15:42:49 |
| R3.htm | 124710 | 2022-02-28 15:42:49 |
| R30.htm | 14380 | 2022-02-28 15:42:49 |
| R31.htm | 68824 | 2022-02-28 15:42:49 |
| R32.htm | 12764 | 2022-02-28 15:42:49 |
| R33.htm | 25256 | 2022-02-28 15:42:49 |
| R34.htm | 16435 | 2022-02-28 15:42:49 |
| R35.htm | 16433 | 2022-02-28 15:42:49 |
| R36.htm | 19238 | 2022-02-28 15:42:49 |
| R37.htm | 4368 | 2022-02-28 15:42:49 |
| R38.htm | 7047 | 2022-02-28 15:42:49 |
| R39.htm | 13668 | 2022-02-28 15:42:49 |
| R4.htm | 24751 | 2022-02-28 15:42:49 |
| R40.htm | 12338 | 2022-02-28 15:42:49 |
| R41.htm | 46614 | 2022-02-28 15:42:49 |
| R42.htm | 15412 | 2022-02-28 15:42:49 |
| R43.htm | 8160 | 2022-02-28 15:42:49 |
| R44.htm | 28581 | 2022-02-28 15:42:49 |
| R45.htm | 5771 | 2022-02-28 15:42:49 |
| R46.htm | 6228 | 2022-02-28 15:42:49 |
| R47.htm | 13908 | 2022-02-28 15:42:49 |
| R48.htm | 10208 | 2022-02-28 15:42:49 |
| R49.htm | 35969 | 2022-02-28 15:42:49 |
| R5.htm | 88987 | 2022-02-28 15:42:49 |
| R50.htm | 16080 | 2022-02-28 15:42:49 |
| R51.htm | 12668 | 2022-02-28 15:42:49 |
| R52.htm | 30043 | 2022-02-28 15:42:49 |
| R53.htm | 28880 | 2022-02-28 15:42:49 |
| R54.htm | 32316 | 2022-02-28 15:42:49 |
| R55.htm | 26412 | 2022-02-28 15:42:49 |
| R56.htm | 24904 | 2022-02-28 15:42:49 |
| R57.htm | 38135 | 2022-02-28 15:42:49 |
| R58.htm | 24881 | 2022-02-28 15:42:49 |
| R59.htm | 12978 | 2022-02-28 15:42:49 |
| R6.htm | 28562 | 2022-02-28 15:42:49 |
| R60.htm | 14461 | 2022-02-28 15:42:49 |
| R61.htm | 7362 | 2022-02-28 15:42:49 |
| R62.htm | 16425 | 2022-02-28 15:42:49 |
| R63.htm | 19036 | 2022-02-28 15:42:49 |
| R64.htm | 40299 | 2022-02-28 15:42:49 |
| R65.htm | 13440 | 2022-02-28 15:42:49 |
| R66.htm | 9158 | 2022-02-28 15:42:49 |
| R67.htm | 10012 | 2022-02-28 15:42:49 |
| R68.htm | 78967 | 2022-02-28 15:42:49 |
| R69.htm | 17801 | 2022-02-28 15:42:49 |
| R7.htm | 65554 | 2022-02-28 15:42:49 |
| R70.htm | 38792 | 2022-02-28 15:42:49 |
| R71.htm | 45318 | 2022-02-28 15:42:49 |
| R72.htm | 12313 | 2022-02-28 15:42:49 |
| R73.htm | 5882 | 2022-02-28 15:42:49 |
| R8.htm | 4639 | 2022-02-28 15:42:49 |
| R9.htm | 79645 | 2022-02-28 15:42:49 |
| report.css | 2767 | 2022-02-28 15:42:49 |
| Show.js | 1085 | 2022-02-28 15:42:49 |
| whd-20211231.htm | 2560416 | 2022-02-28 15:42:49 |
| whd-20211231.xsd | 58605 | 2022-02-28 15:42:49 |
| whd-20211231_cal.xml | 107580 | 2022-02-28 15:42:49 |
| whd-20211231_def.xml | 286734 | 2022-02-28 15:42:49 |
 whd-20211231_g1.jpg | 65605 | 2022-02-28 15:42:49 |
 whd-20211231_g2.jpg | 688304 | 2022-02-28 15:42:49 |
 whd-20211231_g3.jpg | 35802 | 2022-02-28 15:42:49 |
| whd-20211231_htm.xml | 1557644 | 2022-02-28 15:42:49 |
| whd-20211231_lab.xml | 720941 | 2022-02-28 15:42:49 |
| whd-20211231_pre.xml | 484593 | 2022-02-28 15:42:49 |