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Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
$ / shares in Thousands
Sep. 30, 2018
Dec. 31, 2017
Common Stock, par value (in dollars per share) $ 0 $ 0
Common Stock, shares authorized (in shares) 3,000,000 3,000,000
Common Stock, shares issued (in shares) 1,942,495 1,942,495
Common Stock, shares outstanding (in shares) 1,942,495 1,942,495