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Outstanding Stock Options and Stock Awards Excluded from Calculation of Net Loss Per Share (Detail) - shares
shares in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Earnings Per Share Disclosure [Line Items]        
Outstanding securities not included in diluted net loss per share calculation 5,605 5,214 36,847 7,417
Stock Options and Stock Awards        
Earnings Per Share Disclosure [Line Items]        
Outstanding securities not included in diluted net loss per share calculation 5,605 5,214 15,304 7,417
Convertible Notes        
Earnings Per Share Disclosure [Line Items]        
Outstanding securities not included in diluted net loss per share calculation 0 0 21,543 0