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Repurchase of Common Stock
 3 Months Ended
Mar. 31, 2017
Stockholders' Equity Note [Abstract]  
Stockholders' Equity Note Disclosure [Text Block]
Note 6.
Repurchase of Common Stock
 
In 1999 and 2001, the Board of Directors approved resolutions authorizing the Company to repurchase up to a total of 1,000,000 shares of its own stock on the open market, which the Board of Directors reaffirmed in 2008. There were no shares repurchased during the three month period ended March 31, 2017 or 2016. There are approximately 72,000 shares remaining under this repurchase authorization as of March 31, 2017.