Common Stock and Stock-Based Compensation - Restricted Stock Unit Activity (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2021 $ / shares shares
RSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period (in shares)	393
Granted (in shares)	533
Vested (in shares)	(144)
Canceled (in shares)	(47)
Outstanding at end of period (in shares)	735
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted - Weighted average fair value per share at grant date (in usd per share) | $ / shares	$ 18.11
PSUs
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period (in shares)	0
Granted (in shares)	494
Vested (in shares)	0
Canceled (in shares)	(36)
Outstanding at end of period (in shares)	458
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted - Weighted average fair value per share at grant date (in usd per share) | $ / shares	$ 19.53
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]
Outstanding at beginning of period (in shares)	393
Granted (in shares)	1,027
Vested (in shares)	(144)
Canceled (in shares)	(83)
Outstanding at end of period (in shares)	1,193
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract]
Granted - Weighted average fair value per share at grant date (in usd per share) | $ / shares	$ 18.79