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| 0001699136-21-000139.txt | 2021-06-10 17:13:13 | |
 0001699136-21-000139-xbrl.zip | 14217 | 2021-06-10 17:13:13 |
| FilingSummary.xml | 1643 | 2021-06-10 17:13:13 |
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| report.css | 2767 | 2021-06-10 17:13:13 |
| Show.js | 1085 | 2021-06-10 17:13:13 |
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| whd-2021061021xexhibit991.htm | 5948 | 2021-06-10 17:13:13 |