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Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax assets: |  |
Accrued liabilities not currently deductible | $ 476 | $ 651
Intangible assets- excess of financial statement over tax amortization | 5,985 | 982
Goodwill recognized on financial statements in excess of tax amortization |  | (18)
Stock-based compensation | 2,405 | 2,524
Federal net operating and capital losses | 35,052 | 21,531
State, local and foreign net operating and capital loss carryforwards | 3,353 | 12,325
Research & experimental tax and other credit carryforwards | 5,184 | 4,640
Lease liability | 866 | 1,250
Other | 547 | 735
Gross deferred tax assets | 53,868 | 44,620
Valuation allowance | (53,066) | (43,314)
Net deferred tax assets | 802 | 1,306
Deferred tax liabilities: |  |
Intangible assets-excess of tax over financial statement amortization | (393) | (532)
Right-of-use lease asset | (595) | (930)
Net deferred tax liabilities | $ (186) | $ (156)

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