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Condensed Consolidated Balance Sheets (Unaudited) (Parenthetical) - $ / shares
Sep. 30, 2019
Dec. 31, 2018
Common stock, par value (in dollars per share) $ 0.0001 $ 0.0001
Common stock, authorized 100,000,000 100,000,000
Common stock, issued 2,593,783 2,010,028
Common stock, outstanding 2,593,783 2,010,025
Treasury stock 3 3
Series D Preferred Stock [Member]    
Preferred stock, issued 4,725 4,725
Preferred stock, outstanding 4,725 4,725
liquidation preference (in dollars per share) $ 0.0001 $ 0.0001
Series D-1 Preferred Stock [Member]    
Preferred stock, issued 834 834
Preferred stock, outstanding 834 834
liquidation preference (in dollars per share) $ 0.0001 $ 0.0001