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Schedule II - Valuation and Qualifying Accounts (Details) - Schedule of valuation and qualifying accounts - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
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Allowance for doubtful accounts [Member] |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at beginning of period |  | $ 2,452 |  | $ 2,602 | $ 1,821
Charged to costs and expenses |  | 4,824 |  | 1,380 | 1,441
Charged to other accounts describe |  | 381 | [1] | (41) | (91)
Deductions describe | [2] | 1,968 |  | 1,489 | 569
Balance at end of period |  | 5,550 |  | 2,452 | 2,602
Allowance for sales returns, net of inventory [Member] |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at beginning of period |  | 2,587 |  | 1,379 | 3,310
Charged to costs and expenses |  | 1,978 |  | 2,387 | 1,329
Charged to other accounts describe |  |  |  |  |
Deductions describe | [3] | 2,323 |  | 1,179 | 3,260
Balance at end of period |  | 2,242 |  | 2,587 | 1,379
Inventory reserve [Member] |  |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |  |
Balance at beginning of period |  | 4,909 |  | 4,854 | 5,349
Charged to costs and expenses |  | 7,212 |  | 5,321 | 4,694
Charged to other accounts describe |  | 616 | [1] | (70) | (183)
Deductions describe | [4] | 3,366 |  | 5,196 | 5,006
Balance at end of period |  | $ 9,371 |  | $ 4,909 | $ 4,854
[1] | Foreign currency translation adjustment
[2] | Write-off of bad debts.
[3] | Write-off of sales returns.
[4] | Disposal of inventory

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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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