Condensed Consolidated Statements of Stockholders' Equity (Unaudited) - USD ($) $ in Thousands	Common Stock [Member]		Additional Paid-in Capital [Member]	Treasury Stock [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance at Dec. 31, 2014	$ 22		$ 355,906	$ (122,387)	$ (85,352)	$ (1,566)	$ 146,623
Balance-shares (in Shares) at Dec. 31, 2014	21,844
Net income					773		773
Change in accumulated other comprehensive income						586	586
Purchase of treasury stock		[1]		(1,447)			(1,447)
Purchase of treasury stock (in Shares)	(125)
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan		[1]		1,128	(262)		866
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan (in Shares)	116
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees and directors		[1]	26	3,797	(3,012)		811
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees and directors (in Shares)	392
Equity-based compensation			1,253				1,253
Balance at Mar. 31, 2015	$ 22		357,185	(118,909)	(87,853)	(980)	149,465
Balance-shares (in Shares) at Mar. 31, 2015	22,227
Balance at Dec. 31, 2015	$ 22		361,023	(125,697)	(90,763)	(1,267)	143,318
Balance-shares (in Shares) at Dec. 31, 2015	21,573
Net income					(2,913)		(2,913)
Change in accumulated other comprehensive income						683	683
Purchase of treasury stock		[1]		(2,407)			$ (2,407)
Purchase of treasury stock (in Shares)	(275)						(275,460)
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan		[1]		1,114	(235)		$ 879
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan (in Shares)	114
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees and directors		[1]		2,778	(2,198)		580
Issuance of treasury stock upon exercise of stock options, stock appreciation rights and restricted share units by employees and directors (in Shares)	285
Equity-based compensation			985				985
Balance at Mar. 31, 2016	$ 22		$ 362,008	$ (124,212)	$ (96,109)	$ (584)	$ 141,125
Balance-shares (in Shares) at Mar. 31, 2016	21,697

[1] Represents an amount lower than $1.