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Income Taxes - Components of Net Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax assets: |  |
Foreign tax credit carryforward | $ 9,190 | $ 4,202
General business credit carryforward | 3,853 | 2,347
Inventory | 22,178 | 13,536
Net operating losses | 21,348 | 1,250
Allowance for doubtful accounts | 1,043 | 490
Reserve for accrued liabilities | 3,161 | 4,029
Stock options | 868 | 1,670
Unrealized gain/loss | 1,217 | 1,554
Disallowed interest carryforward | 2,071 | 1,912
Other | 221 | 1,939
Total deferred tax assets | 65,150 | 32,929
Valuation allowance | (44,235) | (17,049)
Deferred tax liabilities: |  |
Property, plant and equipment | (7,233) | (6,048)
Goodwill & Intangibles | (1,796) | (1,903)
Deferred revenue | (1,258) | (3,415)
Reserve for unremitted earnings | (2,586) | (3,608)
Other | 586 | 1,917
Deferred Tax Liabilities, Gross, Total | 13,459 | 16,891
Net deferred tax asset | $ 7,456 | $ 1,011

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