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Net Income (Loss) Per Basic and Diluted Share - Reconciliation of Based and Diluted Per Share Amounts (Details) - USD ($)
$ / shares in Units, shares in Millions, $ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Numerator [Abstract]      
Net income (loss) attributable to common stockholders – basic $ (10.2) $ (42.5) $ 5.3
Net income (loss) attributable to common stockholders – diluted $ (10.2) $ (42.5) $ 5.3
Denominator [Abstract]      
Weighted-average shares of common stock – basic (in shares) 70.6 51.9 44.3
Effect of dilutive stock options and restricted stock units (in shares) 0.0 0.0 4.3
Effect of potentially dilutive Series A redeemable convertible preferred stock (in shares) 0.0 0.0 7.7
Diluted (in shares) 70.6 51.9 56.3
Basic (in dollars per share) $ (0.14) $ (0.82) $ 0.12
Diluted (in dollars per share) $ (0.14) $ (0.82) $ 0.09