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Significant Accounting Policies - Calculation of Net Loss and Number of Shares Used to Compute Basic and Diluted Net Loss per Share (Detail) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 31, 2024
Mar. 31, 2023
Loss Earnings Per Share [Line Items]    
Net loss - basic $ (9,953) $ (16,460)
Net loss - diluted $ (9,953) $ (16,460)
Weighted average shares outstanding-basic 410,146 406,177
Weighted average shares outstanding-diluted 410,146 406,177
Net loss per share basic $ (0.02) $ (0.04)
Net loss per share-diluted $ (0.02) $ (0.04)