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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - $ / shares
Mar. 31, 2019
Dec. 31, 2018
Common Stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, authorized (in shares) 30,000,000 30,000,000
Common Stock, issued (in shares) 22,167,486 22,167,486
Common Stock, outstanding (in shares) 22,167,486 22,167,486