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Income Tax - Components of Net Deferred Tax Assets (Liabilities) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax assets: |  |
Foreign tax credit carryforward | $ 19,179 | $ 17,577
General business credit carryforward | 8,008 | 7,053
Inventory | 11,156 | 9,564
Net operating losses | 29,321 | 32,278
Allowance for doubtful accounts | 440 | 970
Reserve for accrued liabilities | 3,302 | 2,769
Stock options and awards | 1,350 | 904
Unrealized gain/loss |  | 810
Disallowed interest carryforward | 1,437 | 2,662
Capitalized R&D costs | 4,653 | 3,282
Other | 2,162 | 820
Total deferred tax assets | 81,008 | 78,689
Valuation allowance | (60,863) | (59,952)
Deferred tax liabilities: |  |
Property, plant and equipment | (7,346) | (7,652)
Goodwill & Intangibles | (6,263) | (1,519)
Deferred revenue | (2,851) | (2,728)
Reserve for unremitted earnings | (2,713) | (2,244)
Unrealized gain/loss | (561) | 0
Other | (1,986) | (3,862)
Total deferred tax liability | (21,720) | (18,005)
Net deferred tax liability | $ (1,575) |
Net deferred tax asset |  | $ 732

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