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Licenses, Royalties and Collaborative Agreements and Commitments (Details) (USD $)
1 Months Ended
Mar. 31, 1992
University Of Michigan
Dec. 31, 2002
Corning
Dec. 31, 2002
Corning
Maximum
Licenses, Royalties and Collaborative Agreements and Commitments      
Royalty revenue as a percentage of net sales of products 2.00% 5.00%  
Future royalty revenue     $ 50,000,000