Share-Based Compensation - Activity of Restricted Stock Unit Awards (Details) shares in Thousands	9 Months Ended
	Sep. 30, 2021 $ / shares shares
Number of RSUs
Unvested shares beginning balance (in shares) | shares	0
Granted (in shares) | shares	123
Vested (in shares) | shares	0
Forfeited (in shares) | shares	(7)
Unvested shares ending balance (in shares) | shares	116
Number of RSUs, Expected to vest (in shares) | shares	116
Weighted Average Fair Value
Unvested shares beginning balance (in dollars per share) | $ / shares	$ 0
Granted (in dollars per share) | $ / shares	10.94
Vested (in dollars per share) | $ / shares	0
Forfeited (in dollars per share) | $ / shares	11.83
Unvested shares ending balance (in dollars per share) | $ / shares	10.90
Weighted Average Fair Value, Expected to vest (in dollars per share) | $ / shares	$ 10.90