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Note 17 - Significant Customers	6 Months Ended
Note 17 - Significant Customers	Jun. 30, 2015
Risks and Uncertainties [Abstract]
Concentration Risk Disclosure [Text Block]	17. Significant Customers Corning had one customer that individually accounted for 11% of the Company’s consolidated net sales in the three and six months ended June 30, 2015. For the three and six months ended June 30, 2014, Corning had one customer that individually accounted for 14% of the Company’s consolidated net sales.