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Significant Components of Deferred Tax Assets and Liabilities (Detail) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Deferred tax assets: |  |
Net operating loss carryforwards | $ 133,476 | $ 136,632
Research and development credit carryforwards | 28,567 | 29,242
Capitalized research and development | 33,571 | 27,916
Compensation related items | 10,306 | 12,014
Operating leases | 3,462 | 3,786
Other | 9,823 | 9,056
Total deferred tax assets | 219,205 | 218,646
Valuation allowance | (216,888) | (215,903)
Net deferred tax assets | 2,317 | 2,743
Deferred tax liabilities: |  |
Right-of-use assets | 2,173 | 2,610
Other | 209 | 194
Total deferred tax liabilities | $ 2,382 | $ 2,804

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