Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies (Details Textual)

v3.20.1
Summary of Significant Accounting Policies (Details Textual) - USD ($)
1 Months Ended 3 Months Ended
May 13, 2020
Sep. 26, 2019
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Summary of Significant Accounting Policies (Textual)          
Negative operating cash flows     $ 3,424,763    
Accumulated deficit     (130,532,225)   $ (119,858,909)
Proceeds from sale of common stock     109,447,482    
Exercise of warrants     4,447,038    
Exercise of options     3,115,193    
Description of reverse stock split   The Company's Board of Directors approved a 1-for-4 reverse split of the Common Stock, which was effective on the NASDAQ Capital Market on September 30, 2019. As a result of the reverse stock split, every 4 shares of issued and outstanding common stock were converted into 1 share of issued and outstanding common stock, with all fractional shares rounded up to the nearest whole share, and the Company's authorized share of common stock were reduced from 200,000,000 to 50,000,000 shares. All share and per share amounts have been retroactively restated to reflect this reverse stock split.      
Short-term investments     $ 102,690,508    
Lease term     12 months    
Unrealized loss     $ 934,919  
Subsequent Event [Member]          
Summary of Significant Accounting Policies (Textual)          
Cash, cash equivalents, and short term investments $ 115,378,100        
Proceeds from warrant and option exercises $ 1,516,400