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Income Taxes - Reserves for unrecognized income tax benefits (Details) - USD ($) | 6 Months Ended | 11 Months Ended | 12 Months Ended
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Jun. 21, 2020 | Dec. 31, 2020 | Dec. 31, 2019
Income Taxes |  |  |
Unrecognized tax benefits, beginning of period | $ 1,275,000 | $ 1,671,000 | $ 639,000
Increases for tax positions taken related to a prior period | 105,000 |  |
Increases for tax positions taken during the current period | 291,000 |  | 636,000
Unrecognized tax benefits, end of period | $ 1,671,000 | 1,671,000 | $ 1,275,000
Refund for NOL carrybacks, CARES Act |  | $ 406 |

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- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 10B -URI http://asc.fasb.org/extlink&oid=120406818&loc=SL37586934-109318 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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- Definition Amount of increase in unrecognized tax benefits resulting from tax positions that have been or will be taken in current period tax return. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=84230637&loc=SL6600010-109319 + Details
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