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Income Taxes - Schedule of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax assets: |  |
Net operating losses | $ 64 | $ 43
Residential product warranty reserve | 7,260 | 7,532
Stock-based compensation | 1,305 | 1,071
Accruals not currently deductible and other | 1,371 | 2,041
Inventories | 2,210 | 5,548
Operating lease liability | 8,965 | 9,081
Deferred revenue | 2,935 | 0
Goodwill amortization | 6,858 | 0
State tax credit carryforwards | 3,394 | 3,345
Gross deferred tax assets, before valuation allowance | 34,362 | 28,661
Valuation allowance | (2,232) | (2,775)
Gross deferred tax assets, after valuation allowance | 32,130 | 25,886
Deferred tax liabilities: |  |
Depreciation | (63,483) | (29,792)
Operating lease right-of-use asset | (8,635) | (8,755)
Goodwill amortization | 0 | (5,775)
Inventories and other | (3,979) | (4,520)
Gross deferred tax liabilities | (76,097) | (48,842)
Net deferred tax liability | $ (43,967) | $ (22,956)

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