CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	RSUs	Cumulative Effect, Period of Adoption, Adjustment	Common Stock	Common Stock RSUs	Additional Paid-in Capital	Additional Paid-in Capital RSUs	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive (Loss) Income	Treasury Stock
Beginning Balance at Dec. 31, 2018	$ 44,473		$ (1,015)	$ 4		$ 61,889		$ (17,418)	$ (1,015)	$ (2)
Beginning balance (in shares) at Dec. 31, 2018				36,182,783
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Warrant exchange	(10,031)					(10,031)
Warrant exchange (in shares)				1,800,065
Net income	19,609							19,609
Issuance of common stock:
Exercise of stock options	227					227
Exercise of stock options (in shares)				30,349
Restricted stock units		$ 0
Restricted stock units (in shares)					21,192
Share-based compensation	2,609					2,609
Adjustment from foreign currency translation, net	95									95
Ending Balance at Dec. 31, 2019	55,967			$ 4		54,694		1,176		93
Ending Balance (in shares) at Dec. 31, 2019				38,034,389
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	33,784							33,784
Issuance of common stock:
Exercise of stock options	1,379					1,379
Exercise of stock options (in shares)				163,783
Restricted stock units		0
Restricted stock units (in shares)					18,953
Share-based compensation	3,237					3,237
Adjustment from foreign currency translation, net	(106)									(106)
Ending Balance at Dec. 31, 2020	94,261			$ 4		59,310		34,960		(13)
Ending Balance (in shares) at Dec. 31, 2020				38,217,125
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	46,843							46,843
Issuance of common stock:
Exercise of stock options	3,037					3,037
Exercise of stock options (in shares)				463,021
Restricted stock units	0	$ (73)					$ (73)
Restricted stock units (in shares)				88,215	47,728
Fully vested shares (in shares)				4,133
Share-based compensation	4,601					4,601
Adjustment from foreign currency translation, net	(63)									(63)
Acquisition of treasury stock, at cost	(5,566)										$ (5,566)
Acquisition of treasury stock, at cost (in shares)											(341,522)
Ending Balance at Dec. 31, 2021	$ 143,040			$ 4		$ 66,875		$ 81,803		$ (76)	$ (5,566)
Ending Balance (in shares) at Dec. 31, 2021				38,820,222							341,522