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Income (Loss) Per Share - Summary of Computation of Basic and Diluted Income (Loss) Per Share (Parenthetical) (Details) - shares
shares in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Anti-dilutive potentially issuable securities excluded from diluted common shares 5,019 4,220 3,538
Warrant      
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]      
Anti-dilutive potentially issuable securities excluded from diluted common shares 3,500    
Warrants expiration date Feb. 28, 2021