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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019
Allowance for doubtful accounts receivable |  |
Movement in valuation and qualifying accounts |  |
Balance at Beginning of Year | $ 407 | $ 460
Provisions | 77 | 10
Amounts Written Off | (30) | (63)
Amounts Recovered | 0 | 0
Effect of Currency Translation | 0 | 0
Balance at End of Year | 454 | 407
Allowance for sales returns |  |
Movement in valuation and qualifying accounts |  |
Balance at Beginning of Year | 298 | 329
Provisions | 2,029 | 1,843
Amounts Written Off | (1,989) | (1,872)
Amounts Recovered | 0 | 0
Effect of Currency Translation | 13 | (2)
Balance at End of Year | 351 | 298
Tax valuation allowance |  |
Movement in valuation and qualifying accounts |  |
Balance at Beginning of Year | 21,388 | 20,256
Provisions | (6,120) | 1,591
Amounts Written Off | 0 | (107)
Amounts Recovered | 0 | (372)
Effect of Currency Translation | (6) | 20
Balance at End of Year | $ 15,262 | $ 21,388

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