Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events Pro Forma Summary Balance Sheet Reflecting Adjustments for Armistice Purchase Agreement (Details)

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Subsequent Events Pro Forma Summary Balance Sheet Reflecting Adjustments for Armistice Purchase Agreement (Details) - USD ($)
Mar. 31, 2017
Dec. 31, 2016
Mar. 31, 2016
Dec. 31, 2015
Subsequent Event [Line Items]        
Cash and cash equivalents $ 3,001,553 $ 5,127,958 $ 16,601,641 $ 21,161,967
Total assets 3,560,770 5,768,865    
Total liabilities 3,986,528 5,561,863    
Preferred stock    
Common stock 10,901 9,434    
Additional paid-in capital 71,559,062 70,232,651    
Accumulated deficit (71,995,721) (70,035,083)    
Total stockholders’ (deficit) equity (425,758) $ 207,002    
Pro Forma        
Subsequent Event [Line Items]        
Cash and cash equivalents 7,651,553      
Total assets 8,210,771      
Total liabilities 3,986,528      
Preferred stock 4      
Common stock 13,247      
Additional paid-in capital 76,206,712      
Accumulated deficit (71,995,721)      
Total stockholders’ (deficit) equity $ 4,224,242