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Schedule II -Valuation and Qualifying Accounts (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | $ 831 |  |
Balance at End of Period | 776 | $ 831 |
Reserve for Uncollectible Accounts Receivable and Sales Return [Member] |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 831 | 530 | $ 596
Charged to Costs and Expenses | 0 | 600 | 215
Deductions | (55) | (300) | (286)
Other | 0 | 1 | 5
Balance at End of Period | 776 | 831 | 530
Sales Returns and Allowances [Member] |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 1,291 | 1,291 | 1,050
Charged to Costs and Expenses | 0 | 0 | 225
SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Other Account | 227 |  |
Deductions | 0 | 0 | 0
Other | 0 | 0 | 16
Balance at End of Period | 1,518 | 1,291 | 1,291
Deferred Tax Valuation Allowance [Member] |  |  |
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] |  |  |
Balance at Beginning of Period | 8,568 | 7,312 | 6,112
Charged to Costs and Expenses | 1,420 | 1,256 | 1,200
Deductions | (1,800) | 0 | 0
Other | 0 | 0 | 0
Balance at End of Period | $ 8,188 | $ 8,568 | $ 7,312

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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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- Definition Amount of increase (decrease) in valuation and qualifying accounts and reserves from adjustment. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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- Definition Amount of valuation and qualifying accounts and reserves. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column B)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 4 -Subparagraph (SX 210.12-09(Column E)) -URI http://asc.fasb.org/extlink&oid=120395691&loc=d3e24092-122690 + Details
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