Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Capitalization (Details)

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Stockholders' Equity and Capitalization (Details) - USD ($)
 3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Feb. 05, 2021
Dec. 31, 2020
Equity [Line Items]        
Common stock, shares authorized (in shares) 5,000,000,000   5,000,000,000 500,000,000
Preferred stock, shares authorized (in shares) 50,000,000   50,000,000 20,000,000
Proceeds from common stock warrant exercises $ 4,030,000 $ 0    
Pre-funded Warrants        
Equity [Line Items]        
Number of warrants exercised (in shares) 11,800,000      
Warrant exercise (in shares) 11,800,000      
Proceeds from common stock warrant exercises $ 11,800      
2020 Common Stock Warrants        
Equity [Line Items]        
Number of warrants exercised (in shares) 67,166,667      
Warrant exercise (in shares) 67,166,667      
Proceeds from common stock warrant exercises $ 4,030,000