Consolidated Statements Of Stockholders' Investment (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Balance	$ 31,130	$ 51,027
Balance, Treasury stock shares	(6,580,272)
Net loss	(6,198)	(20,577)	(33,244)
Balance	26,265	31,130	51,027
Balance, Treasury stock shares	(6,433,490)	(6,580,272)
Common Stock [Member]
Balance	25	25	25
Balance, shares	25,291,637	25,287,387	25,199,734
Employee stock plans
Employee stock plans, shares		4,250	87,653
Balance	25	25	25
Balance, shares	25,291,637	25,291,637	25,287,387
Common Stock In Treasury [Member]
Balance	(114,033)	(114,668)	114,632
Balance, shares		6,668,202
Balance, Treasury stock shares	(6,580,272)	(6,668,202)	(6,646,749)
Employee stock plans	1,388	828
Employee stock plans, shares	181,599	109,985
Shares repurchased	(265)	(193)	(36)
Shares repurchased, shares	(34,817)	(22,055)	(21,453)
Balance	(112,910)	(114,033)	(114,668)
Balance, shares			6,668,202
Balance, Treasury stock shares	(6,433,490)	(6,580,272)	(6,668,202)
Contributed Capital [Member]
Balance	175,610	174,325	174,206
Employee stock plans	1	13	18
Stock based compensation	1,676	1,272	790
Deferred tax expense of disqualified stock options			(689)
Balance	177,287	175,610	174,325
Retained (Deficit) Earnings [Member]
Balance	(31,134)	(9,729)	23,515
Net loss	(6,198)	(20,577)	(33,244)
Treasury stock changes	(1,388)	(828)
Balance	(38,720)	(31,134)	(9,729)
Accumulated Other Comprehensive Income (Loss) [Member]
Balance	662	1,074	(129)
Foreign currency translation adjustments	(90)	214	631
Unrealized investment gain (loss)	11	(626)	572
Balance	$ 583	$ 662	$ 1,074