Parent Directory| Name | Size | Last Modified |
|---|---|---|
 0001699136-22-000008-index-headers.html | 2022-02-28 07:40:57 | |
| 0001699136-22-000008-index.html | 2022-02-28 07:40:57 | |
| 0001699136-22-000008.txt | 2022-02-28 07:40:57 | |
 0001699136-22-000008-xbrl.zip | 29388 | 2022-02-28 07:40:57 |
| FilingSummary.xml | 1655 | 2022-02-28 07:40:57 |
| Financial_Report.xlsx | 5655 | 2022-02-28 07:40:57 |
| MetaLinks.json | 16873 | 2022-02-28 07:40:57 |
| R1.htm | 38604 | 2022-02-28 07:40:57 |
| report.css | 2767 | 2022-02-28 07:40:57 |
| Show.js | 1085 | 2022-02-28 07:40:57 |
 whd-20200429xex99d1g001a.jpg | 2805 | 2022-02-28 07:40:57 |
| whd-20211231xexhibit991.htm | 337713 | 2022-02-28 07:40:57 |
| whd-20220228.htm | 32863 | 2022-02-28 07:40:57 |
| whd-20220228.xsd | 1917 | 2022-02-28 07:40:57 |
| whd-20220228_htm.xml | 10568 | 2022-02-28 07:40:57 |
| whd-20220228_lab.xml | 24275 | 2022-02-28 07:40:57 |
| whd-20220228_pre.xml | 12649 | 2022-02-28 07:40:57 |