Consolidated Statements of Changes in Stockholders' Equity - USD ($) $ in Thousands	Total	Common Stock	Treasury Stock	Additional Paid-in Capital	Accumulated Deficit	Accumulated Other Comprehensive (Loss)/Income
Beginning balance (in shares) at Dec. 31, 2019		30,149,105	(1,639,791)
Beginning balance at Dec. 31, 2019	$ 67,469	$ 32	$ (4,337)	$ 88,022	$ (16,248)	$ 0
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		688,495
Exercise of stock options	1,958	$ 1		1,957
Share-based compensation (in shares)		67,268
Share-based compensation	1,538			1,538
Deferred compensation issuance (in shares)		47,377
Deferred Compensation Issuance	78			78
Purchase of treasury stock (in shares)		(47,650)	(47,650)
Purchase of treasury stock	(329)		$ (329)
Net (loss)/income	3,355				3,355
Foreign currency translation adjustment	0
Forfeitures of restricted stock (in shares)		(81,530)
Forfeitures of restricted stock	(561)			(561)
Ending balance (in shares) at Sep. 30, 2020		30,823,065	(1,687,441)
Ending balance at Sep. 30, 2020	73,508	$ 33	$ (4,666)	91,034	(12,893)	0
Beginning balance (in shares) at Jun. 30, 2020		30,797,535	1,672,741
Beginning balance at Jun. 30, 2020	69,802	$ 33	$ (4,541)	90,305	(15,995)	0
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		25,530
Exercise of stock options	33	$ 0		33
Share-based compensation	571			571
Purchase of treasury stock (in shares)		(14,700)	(14,700)
Purchase of treasury stock	(125)		$ (125)
Net (loss)/income	3,102				3,102
Foreign currency translation adjustment	0
Forfeitures of restricted stock (in shares)		14,700
Forfeitures of restricted stock	125			125
Ending balance (in shares) at Sep. 30, 2020		30,823,065	(1,687,441)
Ending balance at Sep. 30, 2020	73,508	$ 33	$ (4,666)	91,034	(12,893)	0
Beginning balance (in shares) at Dec. 31, 2020		31,024,537	(1,699,975)
Beginning balance at Dec. 31, 2020	74,442	$ 33	$ (4,789)	92,403	(12,957)	(248)
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		764,320
Exercise of stock options	2,076	$ 1		2,075
Share-based compensation (in shares)		149,337
Share-based compensation	2,230			2,230
ESPP Issuance (in shares)		63,193
ESPP issuance	530			530
Purchase of treasury stock (in shares)		(39,480)	(39,480)
Purchase of treasury stock	(420)		$ (420)
Net (loss)/income	(193)				(193)
Foreign currency translation adjustment	204					204
Ending balance (in shares) at Sep. 30, 2021		31,961,907	(1,739,455)
Ending balance at Sep. 30, 2021	78,869	$ 34	$ (5,209)	97,238	(13,150)	(44)
Beginning balance (in shares) at Jun. 30, 2021		31,772,444	1,739,455
Beginning balance at Jun. 30, 2021	77,883	$ 33	$ (5,209)	95,936	(13,505)	628
Increase (Decrease) in Stockholders' Equity
Exercise of stock options (in shares)		186,139
Exercise of stock options	587	$ 1		586
Share-based compensation (in shares)		3,324
Share-based compensation	716			716
Net (loss)/income	355				355
Foreign currency translation adjustment	(672)
Ending balance (in shares) at Sep. 30, 2021		31,961,907	(1,739,455)
Ending balance at Sep. 30, 2021	$ 78,869	$ 34	$ (5,209)	$ 97,238	$ (13,150)	$ (44)