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| 0001628280-21-010423.txt | 2021-05-17 06:52:37 | |
 0001628280-21-010423-xbrl.zip | 130849 | 2021-05-17 06:52:37 |
| FilingSummary.xml | 18740 | 2021-05-17 06:52:37 |
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| hyln-20210331.xsd | 24795 | 2021-05-17 06:52:37 |
| hyln-20210331xex311.htm | 10093 | 2021-05-17 06:52:37 |
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| hyln-20210331xex321.htm | 5207 | 2021-05-17 06:52:37 |
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| R9.htm | 18131 | 2021-05-17 06:52:37 |
| report.css | 2767 | 2021-05-17 06:52:37 |
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