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Income Taxes - components of deferred tax assets and deferred tax liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Deferred tax assets: |  |
Inventory | $ 4,426 | $ 5,089
Tax credit carryforwards | 7,780 | 5,645
Operating loss carryforward-statutory tax | 1,013 | 1,254
Accrued compensated absences | 735 | 588
Allowance for sales discounts | 411 | 576
Depreciation | 561 | 521
Unrealized foreign exchange loss | 179 | 102
Others | 634 | 658
Deferred tax assets | 15,739 | 14,433
Deferred tax liabilities: |  |
Acquired intangible assets | (1,014) | (1,255)
Remeasurement of defined benefit plans | (107) | (139)
Unrealized foreign exchange gain | (17) | 0
Deferred tax liabilities | $ (1,138) | $ (1,394)

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- Definition The amounts of income taxes recoverable in future periods in respect of: (a) deductible temporary differences; (b) the carryforward of unused tax losses; and (c) the carryforward of unused tax credits. [Refer: Temporary differences [member]; Unused tax credits [member]; Unused tax losses [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 12 -IssueDate 2020-01-01 -Paragraph 81 -Subparagraph g -Clause i -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=12&code=ifrs-tx-2020-en-r&anchor=para_81_g_i&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 54 -Subparagraph o -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_54_o&doctype=Standard -URIDate 2020-01-01 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2020-01-01 -Paragraph 56 -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=1&code=ifrs-tx-2020-en-r&anchor=para_56&doctype=Standard -URIDate 2020-01-01 + Details
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