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| 0001493152-22-012921.txt | 2022-05-12 07:44:47 | |
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| ex31-2.htm | 19676 | 2022-05-12 07:44:47 |
| ex32-1.htm | 9172 | 2022-05-12 07:44:47 |
| FilingSummary.xml | 21347 | 2022-05-12 07:44:47 |
| Financial_Report.xlsx | 58242 | 2022-05-12 07:44:47 |
| form10-q.htm | 595709 | 2022-05-12 07:44:47 |
| form10-q_htm.xml | 488990 | 2022-05-12 07:44:47 |
| het-20220331.xsd | 31090 | 2022-05-12 07:44:47 |
| het-20220331_cal.xml | 36988 | 2022-05-12 07:44:47 |
| het-20220331_def.xml | 92379 | 2022-05-12 07:44:47 |
| het-20220331_lab.xml | 239085 | 2022-05-12 07:44:47 |
| het-20220331_pre.xml | 175134 | 2022-05-12 07:44:47 |
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