Annual report pursuant to Section 13 and 15(d)

Organization and Nature of Business (Details)

v3.21.1
Organization and Nature of Business (Details) - USD ($)
12 Months Ended
Nov. 25, 2020
Jun. 19, 2020
Mar. 03, 2020
Dec. 31, 2020
Dec. 31, 2019
Related Party Transaction [Line Items]          
Working capital deficiency       $ 18,200,000  
Net loss       29,214,000 $ 33,982,000
ATM          
Related Party Transaction [Line Items]          
Aggregate offering amount under ATM public offering   $ 150,000,000 $ 50,000,000 $ 48,500,000  
Number of common shares sold under offering (in shares)       33,416,830  
Net proceeds from public offering       $ 46,100,000  
Purchase Agreement          
Related Party Transaction [Line Items]          
Number of common shares sold under offering (in shares) 5,000,000        
Warrant exercise price (in usd per share) $ 1.25        
Warrants granted (in shares) 8,000,000        
Purchase price per unit (in usd per share) $ 1.25        
2020 Pre-Funded Warrant          
Related Party Transaction [Line Items]          
Net proceeds from public offering $ 9,200,000        
Warrant exercise price (in usd per share) $ 0.001        
Warrants granted (in shares) 3,000,000        
Purchase price per unit (in usd per share) $ 1.249