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Note 13 - Fair Value Measurements (Details) - USD ($)
Sep. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Note 13 - Fair Value Measurements (Details) [Line Items]      
Liabilities, Fair Value Disclosure, Nonrecurring $ 0    
Assets, Fair Value Disclosure, Nonrecurring 0    
Samsung Corning Precision Materials Co., Ltd. [Member]      
Note 13 - Fair Value Measurements (Details) [Line Items]      
Business Combination, Contingent Consideration, Asset 445,000,000   $ 445,000,000
IBwave Solutions and Fiberoptics [Member]      
Note 13 - Fair Value Measurements (Details) [Line Items]      
Business Combination, Contingent Consideration, Liability $ 10,000,000 $ 13,000,000