Quarterly report pursuant to Section 13 or 15(d)

Subsequent Events (Details Textual)

v3.19.3
Subsequent Events (Details Textual)
 9 Months Ended
Nov. 06, 2019
USD ($)
shares
Oct. 16, 2019
USD ($)
$ / shares
shares
Oct. 08, 2019
USD ($)
item
$ / shares
shares
Oct. 08, 2019
USD ($)
item
$ / shares
shares
Sep. 30, 2019
USD ($)
item
$ / shares
shares
Sep. 30, 2019
USD ($)
item
$ / shares
shares
Sep. 30, 2018
USD ($)
Apr. 18, 2019
shares
Dec. 31, 2018
$ / shares
Aug. 31, 2018
$ / shares
Jun. 15, 2018
shares
Jan. 31, 2017
$ / shares
Subsequent Event [Line Items]                        
Exercise price of warrants                       $ 5.40
Warrants to purchase shares of common stock | shares               255,102     208,350  
Gross proceeds from exercise of warrants | $           $ 67,000 $ 0          
Warrant [Member]                        
Subsequent Event [Line Items]                        
Exercise price of warrants                 $ 5.40 $ 4.00    
Original Warrants | Maximum [Member]                        
Subsequent Event [Line Items]                        
Exercise price of warrants         $ 5.40 $ 5.40            
Original Warrants | Minimum [Member]                        
Subsequent Event [Line Items]                        
Exercise price of warrants         3.00 3.00            
Subsequent Event [Member]                        
Subsequent Event [Line Items]                        
Number of additional shares of common stock agreed to be issued | shares 152,944                      
Agreed settlement amount to be paid in cash | $ $ 47,223                      
Subsequent Event [Member] | Series F Warrant [Member]                        
Subsequent Event [Line Items]                        
Beneficial ownership limitation       9.99%                
Subsequent Event [Member] | Registered Direct Offering                        
Subsequent Event [Line Items]                        
Number of aggregate common shares issued | shares   2,500,000                    
Public offering price   $ 0.70                    
Warrant Amendment Agreement | Original Warrants                        
Subsequent Event [Line Items]                        
Reduced Exercise price         0.80 0.80            
Amended Exercise Price         $ 0.79 $ 0.79            
Number of holders with whom the amendment agreement was entered into | item         8 8            
Number of warrants exercised | $         $ 83,520              
Gross proceeds from exercise of warrants | $         $ 67,000              
Remaining warrants outstanding | shares         47,547 47,547            
Warrant Amendment Agreement | Subsequent Event [Member] | Original Warrants                        
Subsequent Event [Line Items]                        
Exercise price of warrants     $ 0.79 $ 0.79                
Reduced Exercise price     0.80 0.80                
Amended Exercise Price     0.79 0.79                
Value to be reduced from the Reduced Exercise Price to arrive at the exercise price (per share)     $ 0.01 $ 0.01                
Warrants to purchase shares of common stock | shares     414,364 414,364                
Proceeds from issuance of warrants | $       $ 327,000                
Number of holders with whom the amendment agreement was entered into | item     24 24                
Number of warrants exercised | $     $ 1,044,861                  
Gross proceeds from exercise of warrants | $     $ 836,000                  
Remaining warrants outstanding | shares     1,333,860 1,333,860                
Prospectus Supplement [Member] | Subsequent Event [Member] | Registered Direct Offering                        
Subsequent Event [Line Items]                        
Proceeds from offering used for working capital purposes | $   $ 1,400,000                    
Gross proceeds | $   $ 1,800,000