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| 0001213900-20-006498-index.html | 2020-03-16 16:31:20 | |
| 0001213900-20-006498.txt | 2020-03-16 16:31:20 | |
 0001213900-20-006498-xbrl.zip | 64541 | 2020-03-16 16:31:20 |
| f10k2019ex31-1_hennessy4.htm | 11744 | 2020-03-16 16:31:20 |
| f10k2019ex31-2_hennessy4.htm | 11829 | 2020-03-16 16:31:20 |
| f10k2019ex32-1_hennessy4.htm | 4412 | 2020-03-16 16:31:20 |
| f10k2019ex32-2_hennessy4.htm | 4482 | 2020-03-16 16:31:20 |
| f10k2019ex4-2_hennessy4.htm | 60616 | 2020-03-16 16:31:20 |
| f10k2019_hennessycapital4.htm | 943687 | 2020-03-16 16:31:20 |
| FilingSummary.xml | 15013 | 2020-03-16 16:31:20 |
| Financial_Report.xlsx | 42341 | 2020-03-16 16:31:20 |
| hcac-20191231.xml | 221415 | 2020-03-16 16:31:20 |
| hcac-20191231.xsd | 23941 | 2020-03-16 16:31:20 |
| hcac-20191231_cal.xml | 32305 | 2020-03-16 16:31:20 |
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| hcac-20191231_lab.xml | 179819 | 2020-03-16 16:31:20 |
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| R8.htm | 22785 | 2020-03-16 16:31:20 |
| R9.htm | 31040 | 2020-03-16 16:31:20 |
| report.css | 2767 | 2020-03-16 16:31:20 |
| Show.js | 1085 | 2020-03-16 16:31:20 |