Consolidated Statements Of Stockholders' Equity And Comprehensive Income (Loss) (USD $) In Thousands, unless otherwise specified	Common Stock [Member]	Additional Paid-In Capital [Member]	Accumulated Deficit [Member]	Accumulated Other Comprehensive Income [Member]	Comprehensive Income (Loss) [Member]	Total
Balance at Dec. 31, 2008	$ 2,253	$ 192,228	$ (134,902)	$ 3,668		$ 63,247
Balance, shares at Dec. 31, 2008	22,521
Exercise of stock options and ESPP proceeds	76	5,498				5,574
Exercise of stock options and ESPP proceeds, shares	757
Share-based compensation	3	2,697				2,700
Share-based compensation, shares	30
Proceeds from issuance of common stock	277	20,728				21,005
Proceeds from issuance of common stock, shares	2,773
Shares issued for bonus payment	9	629				638
Shares issued for bonus payment, shares	85
Shares issued for interest on convertible debt	2	90				92
Shares issued for interest on convertible debt, shares	19
Conversion of debenture into shares of common stock	17	3,197				3,214
Conversion of debenture into shares of common stock, shares	171
Repurchase of shares	(4)	(492)				(496)
Repurchase of shares, shares	(35)
Net income (loss)			(22,912)		(22,912)	(22,912)
Other comprehensive income
Foreign currency translation adjustments				939	939	939
Pension adjustment, net of tax benefit				3,991	3,991	3,991
Comprehensive Income (Loss), Net of Tax, Attributable to Parent					(17,982)
Balance at Dec. 31, 2009	2,633	224,575	(157,814)	8,598		77,992
Balance, shares at Dec. 31, 2009	26,321
Exercise of stock options and ESPP proceeds	32	3,258				3,290
Exercise of stock options and ESPP proceeds, shares	319
Share-based compensation	8	2,619				2,627
Share-based compensation, shares	114
Shares issued for exercise of warrants	46	8,509				8,555
Shares issued for exercise of warrants, shares	462
Repurchase of shares	(4)	(542)				(546)
Repurchase of shares, shares	(34)
Net income (loss)			(6,056)		(6,056)	(6,056)
Other comprehensive income
Foreign currency translation adjustments				5,529	5,529	5,529
Pension adjustment, net of tax benefit				(3,370)	(3,370)	(3,370)
Realized gain on marketable securities				2	2	2
Comprehensive Income (Loss), Net of Tax, Attributable to Parent					(3,895)
Balance at Dec. 31, 2010	2,715	238,419	(163,870)	10,759		88,023
Balance, shares at Dec. 31, 2010	27,182
Exercise of stock options and ESPP proceeds	32	2,787				2,819
Exercise of stock options and ESPP proceeds, shares	310
Share-based compensation	17	2,565				2,582
Share-based compensation, shares	177
Conversion of debenture into shares of common stock	51	9,290				9,341
Conversion of debenture into shares of common stock, shares	514
Repurchase of shares		(154)				(154)
Repurchase of shares, shares	(9)
Net income (loss)			849		849	849
Other comprehensive income
Foreign currency translation adjustments				(628)	(628)	(628)
Pension adjustment, net of tax benefit				499	499	499
Comprehensive Income (Loss), Net of Tax, Attributable to Parent					720
Balance at Dec. 31, 2011	$ 2,815	$ 252,907	$ (163,021)	$ 10,630		$ 103,331
Balance, shares at Dec. 31, 2011	28,174