Quarterly report pursuant to Section 13 or 15(d)

Description of the Business and Summary of Significant Accounting Policies (Details Textual)

v3.19.3
Description of the Business and Summary of Significant Accounting Policies (Details Textual)
3 Months Ended 9 Months Ended
Oct. 10, 2019
USD ($)
$ / shares
shares
Jun. 19, 2019
$ / shares
shares
Jun. 16, 2019
USD ($)
$ / shares
shares
Feb. 19, 2019
USD ($)
shares
$ / shares
Sep. 30, 2019
USD ($)
$ / shares
shares
Jun. 30, 2019
USD ($)
Mar. 31, 2019
USD ($)
Sep. 30, 2018
USD ($)
Jun. 30, 2018
USD ($)
Mar. 31, 2018
USD ($)
Sep. 30, 2019
USD ($)
segment
$ / shares
shares
Sep. 30, 2018
USD ($)
shares
Dec. 31, 2018
USD ($)
$ / shares
shares
Dec. 31, 2017
USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                            
Number of operating segments | segment                     1      
Issuance of shares during period, new issues (in shares)       2,172,591                    
Purchase price (in dollars per share) | $ / shares       $ 5.00                    
Gross proceeds from issuance of common stock | $     $ 9,450,000 $ 10,862,955                    
Net proceeds from issuance of common stock | $       9,700,000                    
Convertible notes debt amount | $       $ 11,784,987                    
Issuance of common shares for extinguishment of convertible debt (in shares)       6,825,391                    
Amount of conversion of accrued dividends into common stock | $       $ 4,773,480                    
Shares conversion of accrued dividends into common stock (in shares)       954,696                    
Incremental common shares attributable to dilutive effect of conversion of preferred stock (in shares)       2,534,766                    
Shares vested in period (in shares)       127,500                    
Common stock shares outstanding (in shares)       14,613,000 16,405,062           16,405,062   1,998,056  
Threshold percentage of stock ownership after conversion       4.99%                    
Convertible debt principal | $       $ 47,781                    
Convertible number of equity instruments (percentage)       273,034                    
Exercise price of warrants or rights (in dollars per share) | $ / shares         $ 9.33           $ 9.33   $ 1.75  
Net loss | $         $ (4,294,897) $ (2,973,534) $ (3,208,345) $ (2,978,621) $ (2,565,089) $ (1,351,665) $ (10,476,776) $ (6,895,374)    
Net cash provided by (used in) operating activities | $                     (9,033,513) (3,726,305)    
Accumulated deficit | $         (52,768,270)           (52,768,270)   $ (42,131,275)  
Working capital | $         6,172,954           6,172,954      
Cash balance | $         8,708,641           8,708,641      
Stockholders' equity attributable to parent | $         7,182,147 $ 10,766,186 $ 4,411,740 (17,591,758) $ (14,607,100) $ (12,026,707) 7,182,147 (17,591,758) (19,557,885) $ (10,500,595)
Amortization of intangible assets | $         0     $ 0     0 $ 376    
Offering costs | $         276,560           276,560      
Income tax penalties and interest expense | $         0           $ 0      
Amount of options to purchase (in shares)                     2,843,550 2,235,000    
Amount of warrants to purchase (in shares)                     888,333 91,350    
Amount of unvested restricted stock (in shares)                     170,834 227,500    
Conversion of Preferred Stock into Common Stock                            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                            
Issuance of common shares for extinguishment of preferred shares (in shares)       2,534,766                    
Trademarks                            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                            
Gross finite-lived intangible assets total | $         $ 89,521           $ 89,521   $ 84,942  
Minimum                            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                            
Property, plant and equipment useful life                     3 years      
Maximum                            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                            
Property, plant and equipment useful life                     5 years      
Warrants Issued in Private Investment in Public Equity Offering                            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                            
Number of securities called by each warrant or right (in shares)     1                      
Exercise price of warrants or rights (in dollars per share) | $ / shares   $ 16.00 $ 14.00                      
Term of warrants and rights outstanding     5 years                      
Total proceeds from issuance or sale of equity | $     $ 8,600,000                      
Warrants Issued in Private Investment in Public Equity Offering | Subsequent Event                            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                            
Gross proceeds from issuance of common stock | $ $ 6,250,020                          
Exercise price of warrants or rights (in dollars per share) | $ / shares $ 12.88                          
Term of warrants and rights outstanding 5 years                          
Private Investment in Public Equity Offering                            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                            
Purchase price (in dollars per share) | $ / shares     $ 14.00                      
Number of units issued (in shares)     675,000                      
Number of common stock per unit (in shares)     1                      
Number of warrants per unit (in shares)   0.7 0.7                      
Number of securities called by each warrant or right (in shares)     1                      
Exercise price of warrants or rights (in dollars per share) | $ / shares     $ 16.00                      
Term of warrants and rights outstanding     5 years                      
Private Investment in Public Equity Offering | Subsequent Event                            
New Accounting Pronouncements or Change in Accounting Principle [Line Items]                            
Number of units issued (in shares) 485,250                          
Number of common stock per unit (in shares) 1                          
Number of warrants per unit (in shares) 1.1                          
Number of securities called by each warrant or right (in shares) 1                          
Total proceeds from issuance or sale of equity | $ $ 5,700,000