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SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018
Allowance for doubtful accounts receivable |  |
Movement in valuation and qualifying accounts |  |
Balance at Beginning of Year | $ 460 | $ 395
Provisions | 10 | 818
Amounts Written Off | (63) | (754)
Amounts Recovered | 0 | 0
Effect of Currency Translation | 0 | 1
Balance at End of Year | 407 | 460
Allowance for sales returns |  |
Movement in valuation and qualifying accounts |  |
Balance at Beginning of Year | 329 | 270
Provisions | 1,843 | 1,787
Amounts Written Off | (1,872) | (1,717)
Amounts Recovered | 0 | 0
Effect of Currency Translation | (2) | (11)
Balance at End of Year | 298 | 329
Tax valuation allowance |  |
Movement in valuation and qualifying accounts |  |
Balance at Beginning of Year | 20,256 | 24,024
Provisions | 1,591 | 270
Amounts Written Off | (107) | (1,818)
Amounts Recovered | (372) | (2,210)
Effect of Currency Translation | 20 | (10)
Balance at End of Year | $ 21,388 | $ 20,256

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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=26873400&loc=d3e24092-122690 + Details
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