Income Taxes Components of deferred tax asset/ liability (Details) (USD $)	Dec. 31, 2012	Dec. 31, 2011
Components of Deferred Tax Assets and Liabilities [Abstract]
Net operating loss carry forwards	$ 55,669,000	$ 53,477,000
Tax credit carry forwards	24,826,000	19,902,000
Fixed and intangible assets	7,486,000	7,501,000
Capitalized research and development costs	58,000	37,000
Reserves and other cumulative temporary differences	20,910,000	22,878,000
Gross deferred income tax assets	108,949,000	103,795,000
Valuation allowance	(108,949,000)	(103,795,000)
Net deferred income tax assets	0	0
Undistributed Earnings of Foreign Subsidiaries	$ 9,700,000