CONDENSED CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Retained Earnings (Accumulated Deficit)	Accumulated Other Comprehensive Loss
Beginning balance at Dec. 31, 2019	$ 55,967	$ 4	$ 54,694	$ 1,176	$ 93
Beginning balance (in shares) at Dec. 31, 2019		38,034,389
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	5,688			5,688
Issuance of common stock:
Exercise of stock options	(4)		(4)
Exercise of stock options (in shares)		890
Share-based compensation	722		722
Adjustment from foreign currency translation, net	(144)				(144)
Ending balance at Mar. 31, 2020	62,229	$ 4	55,412	6,864	(51)
Ending balance (in shares) at Mar. 31, 2020		38,035,279
Beginning balance at Dec. 31, 2020	94,261	$ 4	59,310	34,960	(13)
Beginning balance (in shares) at Dec. 31, 2020		38,217,125
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	8,977			8,977
Issuance of common stock:
Exercise of stock options	1,434		1,434
Exercise of stock options (in shares)		144,632
Fully vested shares (in shares)		1,031
Share-based compensation	896		896
Adjustment from foreign currency translation, net	(4)				(4)
Ending balance at Mar. 31, 2021	$ 105,564	$ 4	$ 61,640	$ 43,937	$ (17)
Ending balance (in shares) at Mar. 31, 2021		38,362,788