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Income Taxes - Significant Components of Deferred Income Taxes (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Deferred tax assets:    
Net operating loss carryforwards $ 84,026 $ 74,876
Deferred revenue 4,270 150
Lease liability 722 806
Stock-based compensation 7,822 6,847
Tax credits 5,446 4,503
Other 3,005 2,514
Total deferred tax assets 105,291 89,696
Deferred tax liabilities:    
Intangible assets 5,963 6,087
Right-of-use assets 615 713
Total deferred tax liabilities 6,578 6,800
Deferred tax assets, net 98,713 82,896
Valuation allowance 98,713 82,896
Total deferred tax liability $ 0 $ 0