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Stockholders' Equity (Details) - USD ($)
 9 Months Ended 12 Months Ended
May 31, 2017
Apr. 11, 2017
Dec. 22, 2016
Jun. 16, 2016
Sep. 30, 2017
Sep. 30, 2016
Dec. 31, 2016
Jun. 15, 2016
May 11, 2016
May 10, 2016
Common Stock [Abstract]                    
Each unit consist of number of warrant       3,352,306            
Number of shares callable by warrants (in shares)               1 1,100,000 16,000,000
Warrant exercise price (in dollars per share)               $ 3.06    
Common stock issued (in shares)       6,704,852            
Proceeds from sale of common stock, net         $ 12,377,000 $ 17,702,000        
Common stock, par value (in dollars per share)         $ 0.001   $ 0.001      
Common Stock [Member]                    
Common Stock [Abstract]                    
Common Stock Subscription Price         $ 2.55          
Each unit consist of number of common stock         1          
Each unit consist of number of warrant         0.5          
Number of shares callable by warrants (in shares)         1          
Warrant exercise price (in dollars per share)         $ 3.06          
Period exercisable from the date of issuance         30 months          
Common stock issued (in shares)       6,704,852            
Gross proceeds from private placement of stock       $ 15,300,000            
Redemption price of warrant prior to expiration         $ 0.01          
Common stock price per share for warrant redemption         $ 7.65          
Number of consecutive trading days for warrant redemption         10 days          
Share issued, price per share   $ 1.10                
Common Stock [Member] | Maxim Group LLC [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares) 849,000 8,600,000                
Proceeds from sale of common stock, net $ 800,000 $ 8,700,000                
Common stock, par value (in dollars per share)   $ 0.001                
Share issued, price per share $ 1.10 $ 1.0395                
Closing of offering date   Apr. 17, 2017                
Number of days granted as option to purchase additional shares of common stock to underwriter   45 days                
Additional shares of common stock   944,000                
Common Stock [Member] | Lincoln Park Capital Fund, LLC [Member]                    
Common Stock [Abstract]                    
Period exercisable from the date of issuance     30 months              
Common stock issued, value     $ 20,000,000              
Common Stock [Member] | Purchase Agreement [Member] | Lincoln Park Capital Fund, LLC [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares)     1,490,937              
Common stock issued, value     $ 200,000              
Proceeds from sale of common stock, net     $ 1,500,000              
Common Stock [Member] | Securities Purchase Agreement [Member] | Lincoln Park Capital Fund, LLC [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares)     127,419              
Trading Volume of Common Shares     0              
Common stock issued (in shares)     382,258              
Common Stock [Member] | Maximum [Member] | Purchase Agreement [Member] | Lincoln Park Capital Fund, LLC [Member]                    
Common Stock [Abstract]                    
Floor price of per share     $ 0.50              
Common Stock [Member] | Maximum [Member] | Single Regular Purchase [Member] | Lincoln Park Capital Fund, LLC [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares)     100,000              
Common Stock [Member] | Minimum [Member] | Lincoln Park Capital Fund, LLC [Member]                    
Common Stock [Abstract]                    
Beneficial ownership percentage of common stock outstanding     9.99%              
Common Stock [Member] | Minimum [Member] | Single Regular Purchase [Member] | Lincoln Park Capital Fund, LLC [Member]                    
Common Stock [Abstract]                    
Common stock issued, value     $ 1,000,000              
ATM [Member]                    
Common Stock [Abstract]                    
Common stock issued (in shares)         894,050   1,840,982      
Proceeds from sale of common stock, net         $ 1,500,000   $ 4,400,000