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Payment to customer
9 Months Ended
Sep. 30, 2015
Payment To Customer [Abstract]  
Payment To Customer [Text Block]
7.
Payment to customer
 
In the first quarter of 2015, the Company made  a $2.4 million payment to a customer for new product testing services provided by the customer. As the Company cannot reasonably demonstrate that such payment amount represents the fair value of the services provided by its customer, the payment was recorded as a reduction of net sales in accordance with U.S. GAAP.