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General Credit Agreement	12 Months Ended
General Credit Agreement	Dec. 31, 2016
General Credit Agreement [Abstract]
General Credit Agreement	7.GENERAL CREDIT AGREEMENT The Company had a general credit and security agreement with Bremer Bank, which provided a revolving credit line of up to $3,000,000 and expired on September 30, 2016. The Company had no borrowings under the credit line during the nine months ended September 30, 2016 or the year ended December 31, 2015. This general credit line was replaced with a new agreement, see below. On November 11, 2016, the Company signed a new general credit and security agreement with Bremer Bank, which provides a revolving credit line of up to $6,000,000 and expires on November 11, 2017. The line of credit is collateralized by all receivables, inventory, equipment, and general intangibles of the Company. The Company had no borrowings under the credit line during the year ended December 31, 2016. The credit agreement contains covenants requiring the Company to maintain certain financial ratios. The Company was in compliance with these requirements at all times throughout the year ended December 31, 2016.