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Net Income (Loss) Per Basic and Diluted Share (Tables)
 12 Months Ended
Dec. 31, 2022
Earnings Per Share [Abstract]  
Schedule of Earnings Per Share, Basic and Diluted
The following table provides a reconciliation of the numerators and denominators of the basic and diluted per share computations for net income (loss) attributable to common stockholders:
(in millions, except per share amounts)
Year Ended December 31,202220212020
Numerator:
Net income (loss) attributable to common stockholders – basic and diluted$(10.2)$(42.5)$5.3 
Denominator:
Weighted-average shares of common stock – basic70.6 51.9 44.3 
Effect of dilutive stock options and restricted stock units— — 4.3 
Effect of potentially dilutive Series A redeemable convertible preferred stock— — 7.7 
Weighted-average shares of common stock – diluted70.6 51.9 56.3 
Net income (loss) per share attributable to common stockholders:
Basic$(0.14)$(0.82)$0.12 
Diluted$(0.14)$(0.82)$0.09 
Schedule of Antidilutive Securities Excluded from Computation of Diluted Earnings (Loss) Per Share
The following common stock equivalents were excluded from the computation of diluted net income (loss) per share for the periods presented because including them would have been antidilutive:
(in millions)
Year Ended December 31,202220212020
Shares subject to outstanding stock options and restricted stock units9.6 5.0 2.0 
Employee stock purchase plan1.4 0.6 —