Quarterly report pursuant to Section 13 or 15(d)

Offerings of Common Stock and Warrants and At-the-Market Offering Program - Warrants (Details)

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Offerings of Common Stock and Warrants and At-the-Market Offering Program - Warrants (Details) - USD ($)
1 Months Ended 3 Months Ended
Jun. 16, 2020
Jun. 15, 2020
Feb. 10, 2020
Dec. 09, 2019
Dec. 08, 2019
Sep. 04, 2019
Feb. 04, 2019
Dec. 31, 2019
Jun. 30, 2020
Jun. 30, 2019
Class of Warrant or Right [Line Items]                    
Warrants, aggregate shares           440,000        
Initial exercise price (in dollars per share)                 $ 6.12  
Expected proceeds from warrants $ 1,186,313                  
Decrease the exercise price $ 2.61 $ 3.80   $ 3.80 $ 8.86          
Additional debt discount               $ 300,000    
Aggregate registered direct offering (in shares)           580,000        
Negotiated purchase price of common stock           $ 5.00        
Negotiated purchase price of pre-funded warrant           $ 5.00        
Exercise price of common stock (in dollars per share)                 $ 1.18  
Net proceeds from offering of common stock and warrants           $ 4,600,000     $ 1,376,000 $ 1,223,000
Purchase price           $ 5,100,000        
Aggregate registered direct offering par value (in dollars per share)           $ 0.001        
Issuance of warrants (in shares)                 765,000  
Common warrants period                 5 years  
Percentage of common stock                 75.00%  
Threshold percentage of increase in ownership shift       40.00%            
Selling, general and administrative                    
Class of Warrant or Right [Line Items]                    
Prepaid marketing cost amortized                 $ 100,000  
Series A Warrants                    
Class of Warrant or Right [Line Items]                    
Outstanding warrants (in shares)                 271,875  
Series A Warrants, Exercise Price 25.50                    
Class of Warrant or Right [Line Items]                    
Exercise price (in dollars per share)                 $ 25.50  
Issued warrants (in shares)                 217,875  
Class of Warrant or Right, Exercise Price of Warrants or Rights                 $ 25.50  
Series A Warrants, Exercise Price 13.40                    
Class of Warrant or Right [Line Items]                    
Initial exercise price (in dollars per share)                 $ 13.40  
Issued warrants (in shares)                 54,000  
Series B Warrants                    
Class of Warrant or Right [Line Items]                    
Outstanding warrants (in shares)                 0  
Common Stock Warrants                    
Class of Warrant or Right [Line Items]                    
Warrants, aggregate shares             404,634      
Exercise price (in dollars per share)             $ 8.86      
Issued warrants (in shares)                 49,891  
Deemed dividend                 $ 87,362  
Purchase price             $ 150,000      
Value of warrants                 2,300,000  
Class of Warrant or Right, Exercise Price of Warrants or Rights             $ 8.86      
Notes                    
Class of Warrant or Right [Line Items]                    
Loan Amount $ 100,000           $ 30,000,000      
Additional debt discount                 300,000  
Until April 1, 2021 | Notes                    
Class of Warrant or Right [Line Items]                    
Threshold percentage of increase in ownership shift 42.00%                  
Thereafter | Notes                    
Class of Warrant or Right [Line Items]                    
Threshold percentage of increase in ownership shift 40.00%                  
Sponsorship Agreement                    
Class of Warrant or Right [Line Items]                    
Value of stock issuable     $ 600,000              
Value of stock issued                 229,886  
Sponsorship fee payable in cash     700,000              
Sponsorship fee     $ 1,300,000              
Number of installments     four              
Payment made for sponsorship fee                 $ 400,000