Note 8 - Acquisitions - Fair Value of Samsung Corning Precision Materials at Acquisition Date (Details) (Parentheticals) - Samsung Corning Precision Materials Co., Ltd. [Member] - USD ($) $ in Thousands		12 Months Ended
	Jan. 15, 2014	Dec. 31, 2014
Business Combination, Consideration Transferred	$ 1,600,000	$ 1,900,000
Net fair value of consideration, percent		100.00%
Equity Method Investment, Ownership Percentage		57.50%