CONDENSED CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock	Additional Paid-In-Capital	Treasury Stock	Accumulated Other Comprehensive Loss	Accumulated Deficit	Total
Balance at Dec. 31, 2017	$ 44	$ 230,134	$ (3,161)	$ (5,666)	$ (157,814)	$ 63,537
Balance (in shares) at Dec. 31, 2017	44,490
Increase (Decrease) in Stockholders' Equity
Net income					6,529	6,529
Other comprehensive loss				(1,790)		(1,790)
Treasury shares repurchased			(2,879)			(2,879)
Proceeds from issuance of ESPP		(18)	660			642
Issuance of treasury shares for RSU vested		(5,152)	5,152
Issuance of common stock for contingent earn-out		1,200				1,200
Issuance of common stock for contingent earn-out (in shares)	290
Issuance of common stock for RSU vested	$ 1					1
Issuance of common stock for RSU vested (in shares)	413
Stock based compensation		7,230				7,230
Balance at Sep. 30, 2018	$ 45	233,394	(228)	(7,456)	(149,245)	76,510
Balance (in shares) at Sep. 30, 2018	45,193
Increase (Decrease) in Stockholders' Equity
Impact of change in accounting policy					2,040	2,040
Balance at Dec. 31, 2018	$ 45	235,998	(203)	(7,155)	(150,098)	$ 78,587
Balance (in shares) at Dec. 31, 2018	45,477					45,477
Increase (Decrease) in Stockholders' Equity
Net income					1,247	$ 1,247
Other comprehensive loss				(982)		(982)
Treasury shares repurchased			(2,976)			(2,976)
Proceeds from issuance of ESPP		575				575
Proceeds from issuance of ESPP (in shares)	173
Issuance of treasury shares		(847)	847
Issuance of common stock for contingent earn-out	$ 1	864				865
Issuance of common stock for contingent earn-out (in shares)	243
Issuance of common stock for RSU vested	$ 2	(2)
Issuance of common stock for RSU vested (in shares)	2,221
Stock based compensation		7,150				7,150
Balance at Sep. 30, 2019	$ 48	$ 243,738	$ (2,332)	$ (8,137)	$ (148,851)	$ 84,466
Balance (in shares) at Sep. 30, 2019	48,114					48,114