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Subsequent Events (Details) - USD ($)
 1 Months Ended 12 Months Ended
Aug. 08, 2016
Feb. 09, 2016
Aug. 11, 2015
Jan. 29, 2016
Jul. 31, 2015
Feb. 28, 2015
Oct. 31, 2013
May. 31, 2012
Dec. 31, 2013
Mar. 17, 2016
Subsequent Event [Line Items]                    
Minimum bid price per share required to regain compliance with listing qualifications     $ 1.00              
Stock market granted consecutive trading days preceding the date of notice     30 days              
Common stock sold through the program (in shares)         9,400,000 2,500,000 1,300,000 1,000,000 0  
Net proceeds from issuance of common stock         $ 6,000,000          
ATM Programs [Member] | Series A and B Common Stock Warrants [Member]                    
Subsequent Event [Line Items]                    
Adjusted exercise price of Warrants (in dollars per share)         $ 0.355 $ 0.355        
Subsequent Event [Member]                    
Subsequent Event [Line Items]                    
Minimum bid price per share required to regain compliance with listing qualifications   $ 1.00                
Stock market granted additional calendar days 180 days                  
Subsequent Event [Member] | Series B Common Stock Warrants [Member]                    
Subsequent Event [Line Items]                    
Warrants Exercised (in shares)       2,200,000            
Net proceeds from exercise of warrants       $ 800,000            
Remaining outstanding warrants expired       7,100,000            
Subsequent Event [Member] | ATM Programs [Member]                    
Subsequent Event [Line Items]                    
Common stock sold through the program (in shares)   50,000                
Net proceeds from issuance of common stock   $ 17,500                
Aggregate proceeds from sale of common stock under equity offering program, remaining                   $ 39,900,000