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Income Taxes - Deferred Tax Assets and Deferred Tax Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax assets: |  |
Net operating losses | $ 25,610 | $ 22,658
Intangible assets | 21,179 | 29,145
Research and development credits | 9,736 | 10,773
Property and equipment | 7,071 | 7,426
Valuation reserves and accrued liabilities | 7,333 | 7,131
Capitalized Research and Development Costs | 9,018 |
Stock compensation | 3,832 | 4,200
Defined benefit obligation | 1,466 | 1,974
Inventory | 1,914 | 1,571
Other credits | 10,158 | 12,068
Unrealized foreign currency exchange loss |  | 1,431
Other | 146 | 64
Total deferred tax asset | 97,463 | 98,441
Valuation allowance | (16,090) | (17,197)
Deferred tax liabilities: |  |
Unrealized foreign currency exchange gains | (2,488) |
Undistributed profits of subsidiary | (6,676) | (5,727)
Property and equipment | (2,420) | (2,758)
Other | (1,428) | (572)
Total deferred tax liability | (13,012) | (9,057)
Net deferred tax asset | $ 68,361 | $ 72,187

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