Interim Condensed Consolidated Statements of Changes in Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock Outstanding [Member]		Additional Paid-in Capital [Member]	Treasury Stock [Member]	AOCI Attributable to Parent [Member]	Retained Earnings [Member]	Total
Balance (in shares) at Dec. 31, 2017	22,064,007
Balance at Dec. 31, 2017	$ 22		$ 217,417	$ (26,056)	$ (586)	$ 53,873	$ 244,670
Net loss						(1,729)	(1,729)
Other comprehensive income (loss)					(698)		(698)
Equity-based compensation			8,083				$ 8,083
Purchase of treasury stock (in shares)	527,212						(527,212)
Purchase of treasury stock				(16,742)			$ (16,742)
Issuance of treasury stock upon exercise of stock-based awards (in shares)	365,581
Issuance of treasury stock upon exercise of stock-based awards		[1]	(4,252)	6,630		(129)	$ 2,249
Purchase of treasury stock (in shares)	(527,212)						527,212
Cumulative effect of adoption of new accounting standard						8,555	$ 8,555
Balance (in shares) at Sep. 30, 2018	21,902,376
Balance at Sep. 30, 2018	$ 22		221,248	(36,168)	(1,284)	60,570	244,388
Balance (in shares) at Jun. 30, 2018	22,030,598
Balance at Jun. 30, 2018	$ 22		219,333	(31,640)	(1,417)	58,068	244,366
Net loss						2,543	2,543
Other comprehensive income (loss)					133		133
Equity-based compensation			2,467				$ 2,467
Purchase of treasury stock (in shares)	216,156						(216,156)
Purchase of treasury stock				(6,308)			$ (6,308)
Issuance of treasury stock upon exercise of stock-based awards (in shares)	87,934
Issuance of treasury stock upon exercise of stock-based awards		[1]	(552)	1,780		(41)	$ 1,187
Purchase of treasury stock (in shares)	(216,156)						216,156
Balance (in shares) at Sep. 30, 2018	21,902,376
Balance at Sep. 30, 2018	$ 22		221,248	(36,168)	(1,284)	60,570	$ 244,388
Balance (in shares) at Dec. 31, 2018	21,787,860
Balance at Dec. 31, 2018	$ 22		223,250	(39,132)	(1,114)	62,853	245,879
Net loss						(3,034)	(3,034)
Other comprehensive income (loss)					1,092		1,092
Equity-based compensation			7,847				$ 7,847
Purchase of treasury stock (in shares)	(194,316)						(194,316)
Purchase of treasury stock				(4,861)			$ (4,861)
Issuance of treasury stock upon exercise of stock-based awards (in shares)	390,634
Issuance of treasury stock upon exercise of stock-based awards		[1]	(5,614)	8,501		(450)	$ 2,437
Purchase of treasury stock (in shares)	194,316						194,316
Balance (in shares) at Sep. 30, 2019	21,984,178
Balance at Sep. 30, 2019	$ 22		225,483	(35,492)	(22)	59,369	$ 249,360
Balance (in shares) at Jun. 30, 2019	21,893,128
Balance at Jun. 30, 2019	$ 22		223,306	(37,498)	64	58,751	244,645
Net loss						775	775
Other comprehensive income (loss)					(86)		(86)
Equity-based compensation			2,752				$ 2,752
Purchase of treasury stock (in shares)							0
Issuance of treasury stock upon exercise of stock-based awards (in shares)	91,050
Issuance of treasury stock upon exercise of stock-based awards		[1]	(575)	2,006		(157)	$ 1,274
Purchase of treasury stock (in shares)							0
Balance (in shares) at Sep. 30, 2019	21,984,178
Balance at Sep. 30, 2019	$ 22		$ 225,483	$ (35,492)	$ (22)	$ 59,369	$ 249,360

[1] Amount less than $1.