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Income Taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
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Income Tax Disclosure [Abstract] |  |
Allowance for credit losses and inventory reserves | $ 1,724 | $ 1,337
Warranty accrual | 5,462 | 4,184
Other accruals | 3,989 | 4,814
Share-based compensation | 8,560 | 7,440
Research & development expenses | 18,647 | 11,265
Oklahoma investment credit carryforward | 2,306 | 3,115
Other, net | 1,673 | 2,339
Gross deferred income tax assets | 42,361 | 34,494
Valuation allowance | 0 | (3,115)
Net deferred income tax assets | 42,361 | 31,379
Property & equipment | (54,495) | (50,040)
Total deferred income tax liabilities | (54,495) | (50,040)
Net deferred income tax liabilities | $ 12,134 | $ 18,661

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