Note 8 - Acquisitions (Details) - Fair Value of Samsung Corning Precision Materials at Acquisition Date (Parentheticals)	Jan. 15, 2014
Samsung Corning Precision Materials Co., Ltd. [Member]
Note 8 - Acquisitions (Details) - Fair Value of Samsung Corning Precision Materials at Acquisition Date (Parentheticals) [Line Items]
Net fair value of consideration, percent	100.00%