Stock-Based Compensation - Outstanding Stock-based Compensation Awards (Details) - USD ($) $ / shares in Units, $ in Thousands					12 Months Ended
	Dec. 11, 2020	Oct. 15, 2020	Dec. 03, 2019	Nov. 18, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Stock Option Awards
Beginning balance outstanding stock options (in shares)					4,278,160	5,875,829
Stock options granted during period (in shares)	482,000	388,892	5,556	2,549,552	0	872,003
Exercises (net cash settled) (in shares)					0	(130,017)
Exercises (issuance of shares)					(446,344)	(2,143,317)
Forfeitures/expirations (in shares)					(98,002)	(196,338)
Ending balance outstanding stock options (in shares)					3,733,814	4,278,160	5,875,829
Options exercisable (in shares)					1,293,492	992,061
Weighted- Average Exercise Price
Beginning balance (in dollars per share)					$ 11.20	$ 9.29
Granted (in dollars per share)	$ 10.35	$ 13.82	$ 16.20	$ 16.20	0	11.90
Exercises (in dollars per share)					0	3.68
Exercises (issuance of shares)					7.69	3.69
Forfeitures/expirations (in dollars per share)					13.01	13.22
Ending balance (in dollars per share)					11.59	11.20	$ 9.29
Options exercisable (in dollars per share)					$ 8.61	$ 4.28
Weighted- Average Remaining Contractual Term (years)
Outstanding					7 years 6 months 7 days	8 years 4 months 9 days	8 years 1 month 24 days
Granted						9 years 10 months 13 days
Exercises (net cash settled)						5 years 8 months 26 days
Exercises (issuance of shares)					5 years 10 months 28 days	5 years 9 months 7 days
Forfeitures/expirations					8 years 6 months 7 days	8 years 7 months 20 days
Options exercisable					6 years 9 months 10 days	5 years 9 months 21 days
Aggregate Intrinsic Value (in thousands)
Outstanding stock option awards at January 1					$ 9,855	$ 42,434
Granted					0	1,393
Exercises (net cash settled)					0	896
Exercises (issuance of shares)					8,459	15,511
Forfeitures/expirations					2,078	(146)
Outstanding stock option awards at period end					110,298	9,855	$ 42,434
Options exercisable as of December 31					$ 42,060	$ 9,151