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Condensed Consolidated Balance Sheets (Current Period Unaudited) (Parentheticals) - USD ($)
Jun. 30, 2016
Dec. 31, 2015
Property and equipment, accumulated depreciation $ 228,248 $ 215,028
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized (in shares) 1,000,000,000 1,000,000,000
Common stock, shares issued (in shares) 103,453,492 81,186,620
Common stock, shares outstanding (in shares) 103,453,492 81,186,620