Equity - Changes in Shareholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Balance at beginning of period	$ 202,928	$ 186,031
Exercise of common stock options	3,261	4,102
Issuance for employee stock purchase plan	203	358
Shares withheld for employee taxes upon vesting of RSUs and PSUs	(3,382)
Shares withheld for employee taxes upon vesting of RSUs and PSUs		(3,508)
Stock-based compensation	6,135	6,879
Net (loss) income	(13,069)	15,662
Balance at end of period	196,076	170,035
Adjustment.
Balance at beginning of period		(39,489)
Common stock
Balance at beginning of period	$ 36	$ 35
Balance at beginning of period, shares	35,806,119	34,612,054
Exercise of common stock options, shares	190,074	289,164
Issuance for employee stock purchase plan, shares	13,421	24,630
Vesting of RSUs and PSUs, shares	563,050	413,538
Shares withheld for employee taxes upon vesting of RSUs and PSUs, shares	(191,667)
Shares withheld for employee taxes upon vesting of RSUs and PSUs		(135,562)
Balance at end of period	$ 36	$ 35
Balance at end of period, shares	36,380,997	35,203,824
Additional Paid-In Capital
Balance at beginning of period	$ 502,095	$ 519,143
Exercise of common stock options	3,261	4,102
Issuance for employee stock purchase plan	203	358
Shares withheld for employee taxes upon vesting of RSUs and PSUs	(3,382)
Shares withheld for employee taxes upon vesting of RSUs and PSUs		(3,508)
Share repurchases	5,000
Stock-based compensation	6,135	6,879
Balance at end of period	513,312	482,197
Additional Paid-In Capital | Adjustment.
Balance at beginning of period		(44,777)
Treasury Stock, at cost
Balance at beginning of period	$ (42,861)
Balance at beginning of period, shares	(2,150,717)
Share repurchases	$ (5,000)
Share repurchases (in shares)	(307,132)
Balance at end of period	$ (47,861)
Balance at end of period, shares	(2,457,849)
Accumulated Deficit
Balance at beginning of period	$ (256,342)	(333,147)
Net (loss) income	(13,069)	15,662
Balance at end of period	$ (269,411)	(312,197)
Accumulated Deficit | Adjustment.
Balance at beginning of period		$ 5,288