Income Taxes (Details) (USD $)	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Dec. 31, 2011
Components of required reserve for uncertain tax positions [Abstract]
Federal, state and foreign unrecognized tax benefits	$ 1,844,000		$ 1,791,000
Interest	105,000		80,000
Federal/State Benefit of Interest	(41,000)		(31,000)
Total reserve for UTBs	1,908,000		1,840,000
Income tax holiday [Abstract]
Income Tax Holiday, Description	Effective January 1, 2008, the Company was granted an income tax holiday for a manufacturing facility in China. The tax holiday allows for tax-free operations through December 31, 2009, followed by operations at a reduced income tax rate of 12.5% on the profits generated in 2010 through 2012, with a return to the full statutory rate of 25% for periods thereafter.
Income Tax Holiday, Aggregate Dollar Amount	$ 0	$ 900,000