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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)