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Revenue Recognition
9 Months Ended
Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Revenue from Contract with Customer [Text Block]
4.
Revenue Recognition
 
The Company’s revenue contracts represent a single performance obligation to sell its products to its customers. Sales are recorded at the time control of the products is transferred to customers in an amount that reflects the consideration the Company expects to receive in exchange for the products. All revenue is recorded net of estimated allowances for returns and discounts; these revenue offsets are accrued at the time of the sale. Generally, payments from customers are received within 90 days following the sale. The Company’s contracts with customers do not have significant financing components or significant prepayments from customers, and there is no non-cash consideration. The Company does not have unbilled revenue, and there are no contract assets or contract liabilities.