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Component of Deferred Tax Assets and Liabilities (Detail) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Deferred tax assets:    
Net operating loss carryforwards $ 155,503 $ 224,161
Research credit carryforwards 12,870 28,578
Lease Liability 8,515
Stock Compensation 5,798
Accruals and reserves 5,792 17,264
Other 212 3,250
Total deferred tax assets 188,690 273,253
Less valuation allowance (179,253) (266,100)
Net deferred tax assets 9,437 7,153
Deferred tax liabilities:    
Fixed assets (3,283) (275)
Operating lease right-of-use assets (6,124) (6,878)
Other (30)
Total deferred tax liabilities (9,437) (7,153)
Net deferred tax assets $ 0 $ 0