General Credit Agreement	3 Months Ended
General Credit Agreement	Mar. 31, 2015
General Credit Agreement [Abstract]
General Credit Agreement	4. 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 on May 4, 2015. The Company had no borrowings under the credit line during the three months ended March 31, 2015 or the year ended December 31, 2014. 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 three months ended March 31, 2015.

The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants.

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