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Stock Warrants (Details Textual) - $ / shares
Dec. 31, 2016
Dec. 08, 2010
Stock Warrants [Line Items]    
Warrants outstanding 0  
First Placement Agent    
Stock Warrants [Line Items]    
Stock warrants (in shares)   338,182
Second Placement Agent    
Stock Warrants [Line Items]    
Stock warrants (in shares)   16,364
Warrant Issued in Connection with Private Placement Offering    
Stock Warrants [Line Items]    
Stock warrants, exercise price (in dollars per share)   $ 1.21