Quarterly report pursuant to Section 13 or 15(d)

Organization and Nature of Business (Details)

v3.20.2
Organization and Nature of Business (Details) - USD ($)
$ in Thousands
1 Months Ended 3 Months Ended 9 Months Ended
Mar. 03, 2020
Oct. 31, 2020
Jun. 19, 2020
Sep. 30, 2020
Jun. 30, 2020
Mar. 31, 2020
Sep. 30, 2019
Jun. 30, 2019
Mar. 31, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Organization and Nature of Business (Textual)                        
Working capital                   $ 23,200    
Cash       $ 31,376           31,376   $ 4,777
Net loss       $ (7,451) $ (7,303) $ (6,168) $ (6,579) $ (5,231) $ (5,149) (20,919) $ (16,960)  
ATM [Member]                        
Organization and Nature of Business (Textual)                        
Net proceeds from public offering                   $ 44,000    
Aggregate offering amount under ATM public offering $ 50,000   $ 150,000                  
Sale of common shares       1,604,312 29,033,036 937,010       31,574,358    
ATM [Member] | Subsequent Event [Member]                        
Organization and Nature of Business (Textual)                        
Common stock additional issued   213,474                    
Net proceeds from public offering   $ 230