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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 |

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