Statements of Changes In Statements of Stockholders' Equity (USD $) In Thousands, except Share data	Common Stock [Member]		Additional Paid-in Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2011	$ 23		$ 341,352	$ (122,236)	$ (1,756)	$ (68,759)	$ 148,624
Balance (in Shares) at Dec. 31, 2011	22,502,000
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan		[1]		4,485		(2,507)	1,978
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan (in Shares)	446,000
Issuance of treasury		[1]		86		(86)
Issuance of treasury (in Shares)	9,000
Purchase of treasury stock	(1)			(8,059)			(8,060)
Purchase of treasury stock (in Shares)	(1,283,000)						1,283,000
Equity-based compensation expenses			4,983				4,983
Net income (loss)						(8,042)	(8,042)
Change in Accumulated other comprehensive income					2,744		2,744
Balance at Dec. 31, 2012	22		346,335	(125,724)	988	(79,394)	142,227
Balance (in Shares) at Dec. 31, 2012	21,674,000
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan		[1]		3,668		(2,004)	1,664
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan (in Shares)	374,000
Issuance of treasury	1			6,796		(4,813)	1,984
Issuance of treasury (in Shares)	692,000
Purchase of treasury stock	(1)			(3,489)			(3,490)
Purchase of treasury stock (in Shares)	(390,000)						390,000
Equity-based compensation expenses			4,159				4,159
Net income (loss)						2,676	2,676
Change in Accumulated other comprehensive income					(1,809)		(1,809)
Balance at Dec. 31, 2013	22		350,494	(118,749)	(821)	(83,535)	147,411
Balance (in Shares) at Dec. 31, 2013	22,350,000
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan		[1]		3,031		(1,309)	1,722
Issuance of treasury stock upon purchase of common stock under employee stock purchase plan (in Shares)	310,000
Issuance of treasury	1		53	5,814		(4,110)	1,758
Issuance of treasury (in Shares)	598,000
Purchase of treasury stock	(1)			(12,483)			(12,484)
Purchase of treasury stock (in Shares)	(1,414,000)						1,414,000
Equity-based compensation expenses			5,359				5,359
Net income (loss)						3,602	3,602
Change in Accumulated other comprehensive income					(745)		(745)
Balance at Dec. 31, 2014	$ 22		$ 355,906	$ (122,387)	$ (1,566)	$ (85,352)	$ 146,623
Balance (in Shares) at Dec. 31, 2014	21,844,000

[1] Represents an amount lower than $1.