Consolidated Statements of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive Income (Loss)	Total
Balance (in shares) at Dec. 31, 2021	33,240
Balance at Dec. 31, 2021	$ 33	$ 559,883	$ (22,722)	$ 1,765	$ 538,959
Increase (Decrease) in Stockholders' Equity
Net income			41,614		41,614
Foreign currency translation adjustments				(1,186)	(1,186)
Change in pension obligation				9	9
Exercise of stock options (in shares)	41
Exercise of stock options		491			491
Issuance of common stock on restricted stock units, net of shares withheld (in shares)	67
Issuance of common stock on restricted stock units, net of shares withheld		(3,315)			(3,315)
Stock-based compensation expense		2,701			2,701
Repurchase of common stock (in shares)	(284)
Repurchase of common stock		(5,127)	(14,873)		(20,000)
Balance (in shares) at Mar. 31, 2022	33,064
Balance at Mar. 31, 2022	$ 33	554,633	4,019	588	559,273
Balance (in shares) at Dec. 31, 2022	32,775
Balance at Dec. 31, 2022	$ 33	550,299	118,892	(1,968)	667,256
Increase (Decrease) in Stockholders' Equity
Net income			47,697		47,697
Foreign currency translation adjustments				50	50
Exercise of stock options (in shares)	2
Exercise of stock options		25			25
Issuance of common stock on restricted stock units, net of shares withheld (in shares)	56
Issuance of common stock on restricted stock units, net of shares withheld		(3,907)			(3,907)
Stock-based compensation expense		3,199			3,199
Repurchase of common stock (in shares)	(107)
Repurchase of common stock		(1,924)	(10,575)		(12,499)
Balance (in shares) at Mar. 31, 2023	32,726
Balance at Mar. 31, 2023	$ 33	$ 547,692	$ 156,014	$ (1,918)	$ 701,821