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SCHEDULE II VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Allowance for doubtful accounts |  |  |
Valuation and qualifying accounts |  |  |
Balance at Beginning of Year | $ 2,110 | $ 1,935 | $ 1,364
Charged to Costs and Expenses | 392 | (98) | 977
Valuation Allowances and Reserves, Charged to Other Accounts | 570 | (273) | 406
Deductions | 0 | 0 | 0
Balance at End of Year | 1,932 | 2,110 | 1,935
Sales Returns and Allowances [Member] |  |  |
Valuation and qualifying accounts |  |  |
Balance at Beginning of Year | 4,566 | 4,748 | 3,317
Charged to Costs and Expenses | 2,659 | (182) | 1,431
Valuation Allowances and Reserves, Charged to Other Accounts | 0 | 0 | 0
Deductions | 0 | 0 | 0
Balance at End of Year | 7,225 | 4,566 | 4,748
Allowance for deferred tax assets |  |  |
Valuation and qualifying accounts |  |  |
Balance at Beginning of Year | 11,316 | 11,617 | 13,254
Charged to Costs and Expenses | 1,763 | 1,166 | 1,423
Valuation Allowances and Reserves, Charged to Other Accounts | 0 | 0 | 0
Deductions | 1,088 | 1,467 | 3,060
Balance at End of Year | $ 11,991 | $ 11,316 | $ 11,617

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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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