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INCOME TAXES - Schedule of Company's Deferred Tax Assets (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 159,740 | $ 164,276
Research and development tax credit carryforwards | 35,260 | 27,679
Stock-based compensation | 6,691 | 5,321
Deferred revenue | 61,114 | 20,681
Fixed assets | 10,130 | 10,525
Lease liability | 11,279 | 10,251
Accruals and reserves | 1,119 | 430
Other | 106 | 308
Total deferred tax asset | 285,439 | 239,471
Valuation allowance | 259,820 | 214,351
Deferred tax assets | 25,619 | 25,120
Liabilities: |  |
Intangible assets | (13,856) | (14,321)
Operating lease right-of-use assets | (17,348) | (17,510)
Deferred tax liabilities | (31,204) | (31,831)
Total net deferred tax liabilities | $ (5,585) | $ (6,711)

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