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Stockholders' Equity (Details Narrative) - USD ($)
 1 Months Ended 3 Months Ended 9 Months Ended 12 Months Ended 65 Months Ended
Oct. 27, 2018
Oct. 27, 2017
Oct. 27, 2017
Oct. 04, 2017
Jul. 06, 2017
Jun. 09, 2017
May 26, 2017
May 16, 2017
Feb. 14, 2017
May 27, 2015
Aug. 31, 2018
Sep. 30, 2015
Dec. 31, 2017
Sep. 30, 2018
Sep. 30, 2017
Dec. 31, 2017
Sep. 30, 2018
Jun. 26, 2017
Sep. 30, 2016
Jan. 15, 2014
Feb. 22, 2013
Shelf registration statement amount                       $ 75,000,000                  
Common stock, shares authorized                         112,500,000 112,500,000   112,500,000 112,500,000        
Preferred stock, shares authorized                         100,000 100,000   100,000 100,000   100,000    
Aggregate of common and preferred stock, shares authorized                                     112,600,000    
Reverse stock split             14-for-1 reverse stock split                            
Stock issued during period split stock             14 56,982,418                          
Stock issued during period reverse stock split             14 4,070,172                          
Share-based compensation arrangement by share-based payment award, options, outstanding, number, ending balance               200,000                          
Class of warrant or right, outstanding               2,400,000                          
Common stock, par or stated value per share                         $ 0.01 $ 0.01   $ 0.01 $ 0.01        
Class of warrant or right, number of securities called by warrants or rights                                   506,627      
Class of warrant or right, exercise price of warrants or rights                                   $ 1.65      
Proceeds from warrant exercises                           $ 4,925,886            
Aggregate offering price, additions                           15,000,000              
Fair value of common stock issued as equity issuance costs and charged against paid in capital                           $ 450,000            
2013 Warrants, 2014 Warrants, and June 2016 Warrants [Member]                                          
Proceeds from warrant exercises           $ 2,100,000                              
Increase (decrease) in fair value of warrants           $ 200,000                              
2015 Warrants [Member]                                          
Proceeds from warrant exercises                   $ 800,000                      
Increase (decrease) in fair value of warrants                   100,000                      
June 2016 Warrants [Member]                                          
Proceeds from warrant exercises                   $ 800,000                      
July 2017 Direct Offering [Member]                                          
Stock issued during period, shares, new issues         2,050,000                                
Class of warrant or right, number of securities called by each warrant or right       4,665,000                                  
Share price         $ 2.07                                
Proceeds from issuance of common stock, gross         $ 4,243,500                                
Proceeds from issuance of warrants       $ 16,600,000                                  
Shares issued under the agreement         2,050,000                                
July 2017 Direct Offering [Member] | Pre-Funded Series CCC Warrants [Member]                                          
Class of warrant or right, number of securities called by warrants or rights         385,000                                
Class of warrant or right, offered price of warrants or rights         $ 2.06                                
Beneficial ownership percentage threshold         9.99%                                
Proceeds from issuance of warrants         $ 793,100                                
Class of warrant or right, exercise price of warrants or rights         $ 0.01                                
Class of warrant or right, exercised during period                         385,000                
July 2017 Direct Offering [Member] | Series AAA Warrants [Member]                                          
Class of warrant or right, number of securities called by warrants or rights         2,435,000                                
Class of warrant or right, exercise price of warrants or rights       $ 2.07 $ 2.07                                
July 2017 Direct Offering [Member] | Series BBB Warrants [Member]                                          
Class of warrant or right, number of securities called by warrants or rights         2,435,000                                
Class of warrant or right, exercise price of warrants or rights       $ 4.75 $ 4.75                                
July 2017 Direct Offering [Member] | Series DDD Warrants [Member]                                          
Class of warrant or right, number of securities called by warrants or rights       1,166,250                                  
Class of warrant or right, number of securities called by each warrant or right       1                                  
Class of warrant or right, exercise price of warrants or rights       $ 6.20                                  
February 14, 2017 Public Offering [Member]                                          
Stock issued during period, shares, new issues                 1,384,704                        
Shares issued, price per share                 $ 3.22                        
Maximum beneficial ownership of the purchaser                 9.99%                        
Proceeds from issuance of common stock                 $ 5,000,000                        
Shares issued under the agreement                 1,384,704                        
February 14, 2017 Public Offering [Member] | Series AA Warrant [Member]                                          
Class of warrant or right, number of securities called by warrants or rights                 1,177,790                        
Class of warrant or right, exercise price of warrants or rights                 $ 3.22                        
Class of warrant or right, term                 5 years                        
Stock issued during period, shares, exercise of warrants                               747,254          
Proceeds from warrant exercises                               $ 2,400,000          
February 14, 2017 Public Offering [Member] | Pre-Funded Series BB Warrant [Member]                                          
Class of warrant or right, number of securities called by warrants or rights                 185,713                        
Class of warrant or right, exercise price of warrants or rights                 $ 0.14                        
Shares issued, price per share                 $ 3.08                        
Stock issued during period, shares, exercise of warrants                               185,713          
May 2015 Common Stock Offering [Member] | 2015 Warrants [Member]                                          
Class of warrant or right, number of securities called by warrants or rights                   139,284                      
Class of warrant or right, exercise price of warrants or rights                   $ 36.40                      
Aspire Purchase Agreement [Member]                                          
Stock issued during period, shares, new issues                     164,835                    
Aggregate offering price                     $ 15,000,000                    
Maximum number of shares purchased per day                     100,000                    
Maximum number of shares purchased per day, additional                     2,000,000                    
Aspire purchase agreement, terms                     In addition, on any date on which the Company submits a Purchase Notice to Aspire Capital in an amount equal to at least 100,000 shares, the Company also has the right, in its sole discretion, to present Aspire Capital with a volume-weighted average price purchase notice (each, a “VWAP Purchase Notice”) directing Aspire Capital to purchase an amount of stock equal to up to 30% of the aggregate shares of the Company’s common stock traded on its principal market on the next trading day (the “VWAP Purchase Date”), subject to a maximum number of shares the Company may determine. The purchase price per share pursuant to such VWAP Purchase Notice is generally 97% of the volume-weighted average price for the Company’s common stock traded on its principal market on the VWAP Purchase Date                    
Shares issued under the agreement                     164,835                    
ATM Agreement [Member]                                          
Stock issued during period, shares, new issues                                 1,784,396        
Proceeds from issuance of common stock                                 $ 12,800,000        
Shares issued under the agreement                                 1,784,396        
Underwriting Agreement [Member] | Oppenheimer & Co. Inc. [Member]                                          
Stock issued during period, shares, new issues     2,640,000                                    
Common stock, par or stated value per share   $ 0.01 $ 0.01                                    
Class of warrant or right, number of securities called by warrants or rights   1,320,000 1,320,000                                    
Warrant, description     Each share of Common Stock is being sold together with 0.5 warrants (the “Investor Warrants”), each whole Investor Warrant being exercisable for one share of Common Stock, at an offering price of $2.50 per share and related Investor Warrants.                                    
Shares issued under the agreement     2,640,000                                    
Warrant [Member]                                          
Share-based compensation arrangement by share-based payment award, options, outstanding, number, ending balance               2,400,000                          
Class of warrant or right, outstanding               33,500,000                          
Class of warrant or right, number of securities called by each warrant or right   2.325 2.325                                    
Class of warrant or right, offered price of warrants or rights   $ 3.00 $ 3.00                                    
Warrants issued, expiration period 5 years                                        
Investor Warrants [Member] | October 2017 Underwritten Offering [Member]                                          
Class of warrant or right, number of securities called by warrants or rights   66,000 66,000                                    
Class of warrant or right, number of securities called by each warrant or right   2.87 2.87                                    
Warrants issued, expiration period   5 years                                      
Proceeds from issuance of common stock and warrants   $ 6,600,000                                      
Investor Warrants [Member] | Underwriting Agreement [Member] | Oppenheimer & Co. Inc. [Member]                                          
Class of warrant or right, number of securities called by each warrant or right   2.50 2.50                                    
Minimum [Member]                                          
Common stock, shares authorized                                     75,000,000    
Maximum [Member]                                          
Common stock, shares authorized                                     112,500,000    
Maximum [Member] | Warrant [Member]                                          
Class of warrant or right, number of securities called by warrants or rights           790,410                           64,348 95,811
Class of warrant or right, exercise price of warrants or rights           $ 2.70                           $ 57.40 $ 74.34