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Income Taxes - Deferred Income Taxes (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
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Deferred tax assets: |  |
State net operating loss carryforwards | $ 52 | $ 96
Foreign net operating loss carryforwards | 122 | 182
Federal tax credit carryforwards | 3,378 | 1,999
State tax credit carryforwards | 11,357 | 9,560
Property, plant and equipment | 4,896 | 6,979
Operating lease liability | 5,504 | 5,564
Accrued compensation | 313 | 242
Inventories | 552 | 804
Stock compensation | 2,399 | 1,790
Warranty | 2,666 | 3,108
Deferred revenue | 6,562 | 6,389
Capitalized research and development costs | 54,673 | 38,036
Gross deferred tax assets | 92,474 | 74,749
Valuation allowance | (14,736) | (10,963)
Net deferred tax assets | 77,738 | 63,786
Deferred tax liabilities: |  |
Right-of-use asset | (8,750) | (9,155)
Other | (711) | (1,203)
Gross deferred tax liabilities | (9,461) | (10,358)
Deferred taxes, net | $ 68,277 | $ 53,428

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