Quarterly report pursuant to Section 13 or 15(d)

Balance Sheets (Current Period Unaudited) (Parentheticals)

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Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
Mar. 31, 2020
Dec. 31, 2019
Property and equipment, accumulated depreciation and amortization $ 301,506 $ 300,258
Common stock, par value (in dollars per share) $ 0.01 $ 0.01
Common stock, shares authorized (in shares) 30,000,000 30,000,000
Common stock, shares issued (in shares) 12,854,376 12,854,376
Common stock, shares outstanding (in shares) 11,211,760 11,211,760
Treasury stock, shares (in shares) 1,642,616 1,642,616