Quarterly report pursuant to Section 13 or 15(d)

Common Stock (Details Narrative)

v3.19.2
Common Stock (Details Narrative) - USD ($)
3 Months Ended 6 Months Ended
Jan. 30, 2019
Jan. 05, 2018
Jun. 30, 2019
Jun. 30, 2018
Mar. 31, 2018
Jun. 30, 2019
Jun. 30, 2018
Aggregate common stock sold, shares          
Gross proceeds from sale of stock           $ 40,596,961 $ 12,003,266
Stock issuance cost       $ 52,201      
Issuance of common stock upon exercise of stock options, shares       78,229
Warrants [Member]              
Aggregate common stock sold, shares     1,119,868     172,414  
Issuance of common stock upon exercise of stock options, shares           1,283,500  
Warrants to purchase common stock     200,000     200,000  
Stock Option [Member]              
Issuance of common stock upon exercise of stock options, shares     16,458 52,604   78,229 89,069
Proceeds from exercise of stock options     $ 102,708 $ 146,612   $ 306,711 $ 303,266
Public Offering [Member]              
Number of common stock value sold $ 6,198,500            
Gross proceeds from sale of stock $ 40,300,000            
Purchase price per share $ 6.50            
Stock issuance cost $ 2,600,000            
Public Offering [Member] | Underwriters [Member]              
Number of common stock value sold $ 808,500            
January 2018 Sales Agreement [Member] | Institutional Investor [Member]              
Aggregate common stock sold, shares         1,500,000    
Gross proceeds from sale of stock         $ 11,200,000    
January 2018 Sales Agreement [Member] | Maximum [Member]              
Number of common stock value sold   $ 50,000,000