Annual report pursuant to Section 13 and 15(d)

CONSOLIDATED BALANCE SHEETS (Parentheticals)

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CONSOLIDATED BALANCE SHEETS (Parentheticals) - USD ($)
Dec. 31, 2018
Dec. 31, 2017
Preferred stock, par value (in dollars per share) $ 0.001 $ 0.001
Preferred stock, shares authorized 20,000,000 20,000,000
Common stock, par value (in dollars per share) $ 0.001 $ 0.001
Common stock, shares authorized 500,000,000 500,000,000
Common stock, shares issued 133,907,747 33,622,829
Common stock, shares outstanding 133,907,747 33,622,829
Redeemable Convertible Series B Preferred Stock    
Preferred stock, shares issued 0 2,833.55
Preferred stock, shares outstanding 0 2,833.55
Issuance costs (in dollars)   $ 347,091
Liquidation preference value (in dollars)   $ 2,800,000
Convertible Series D Preferred Stock    
Preferred stock, shares issued 0 200
Preferred stock, shares outstanding 0 200
Issuance costs (in dollars)   $ 30,557
Liquidation preference value (in dollars)   $ 200,000
Convertible Series F Preferred Stock    
Preferred stock, shares issued 0 2,000
Preferred stock, shares outstanding 0 2,000
Issuance costs (in dollars)   $ 118,855