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Thin Film Japan Distribution Agreement (Details) (USD $)
 3 Months Ended
Mar. 31, 2013
Installment
Mar. 31, 2012
Feb. 28, 2013
Dec. 31, 2012
Dec. 31, 2004
Thin Film Japan Distribution Agreement [Abstract]          
License fee recorded as deferred revenue $ 232,000   $ 2,379,000 $ 2,635,000 $ 1,500,000
Period before post commercialization in case of termination for proportional refund 3 years        
Milestone payments received 1,250,000        
Payment obligation under termination agreement 1,200,000        
Number of installment payments 6        
Periodic payment under termination agreement 200,000        
Deferred revenues 232,000   2,379,000 2,635,000 1,500,000
First installment payment 200,000 0      
Termination fee obligation 1,000,000        
Development revenue $ 1,179,000 $ 0