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Earnings Per Share - Summary of Components of Basic and Diluted Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Net income (loss) $ (15,303) $ (2,944) $ (6,346) $ (21,799)
Weighted average common shares outstanding, basic 115,985 57,865 78,191 57,865
Dilutive effect of preferred stock [1] 0 0 0 0
Dilutive effect of stock options [1] 0 0 0 0
Dilutive effect of warrants [1] 0 0 0 0
Weighted average common shares outstanding, diluted 115,985 57,865 78,191 57,865
Net loss per share, basic $ (0.13) $ (0.05) $ (0.08) $ (0.38)
Net loss per share, diluted $ (0.13) $ (0.05) $ (0.08) $ (0.38)
Stock options        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from diluted loss per share [1] 26,652 22,973 26,652 22,973
Warrants        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from diluted loss per share [1] 0 1,887 0 1,887
Preferred Stock        
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]        
Anti-dilutive securities excluded from diluted loss per share [1] 0 138,612 0 138,612
[1] Due to the net loss during each of the three and nine months ended September 30, 2021 and 2020, no dilutive securities were included in the calculation of diluted loss per share because they would have been anti-dilutive.