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| 0001437749-21-012333.txt | 2021-05-14 16:31:40 | |
 0001437749-21-012333-xbrl.zip | 137630 | 2021-05-14 16:31:40 |
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| Financial_Report.xlsx | 75959 | 2021-05-14 16:31:40 |
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| hrth-20210331.xsd | 54198 | 2021-05-14 16:31:40 |
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| hrth20210331_10q.htm | 847467 | 2021-05-14 16:31:40 |
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| report.css | 2767 | 2021-05-14 16:31:40 |
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