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General Credit Agreement	12 Months Ended
General Credit Agreement	Dec. 31, 2015
General Credit Agreement [Abstract]
General Credit Agreement	7.GENERAL CREDIT AGREEMENT The Company has a general credit and security agreement with Bremer Bank, which provides a revolving credit line of up to $3,000,000 and expires May 4, 2016. The Company had no borrowings under the credit line during the years ended December 31, 2015 or 2014. The credit agreement contains certain covenants requiring the Company to maintain certain financial ratios. The Company was in compliance with these requirements as of December 31, 2015.