Annual report pursuant to Section 13 and 15(d)

Recent Developments, Liquidity and Management's Plans - Summary of Milestone Events Payment (Details) (Parenthetical)

v3.20.4
Recent Developments, Liquidity and Management's Plans - Summary of Milestone Events Payment (Details) (Parenthetical)
 12 Months Ended
Nov. 12, 2020
Integer
Dec. 31, 2020
USD ($)
Integer
Number of consecutive trading days | Integer 10  
Milestone Period One [Member]    
Number of trading days | Integer   10
Number of consecutive trading days | Integer   20
Market capitalization   $ 500,000,000
Payments to milestone   $ 20,000,000
Milestone Period Two [Member]    
Number of trading days | Integer   10
Number of consecutive trading days | Integer   20
Increase in market capitalization   $ 250,000,000
Incremental increase payable   20,000,000
Milestone Period Two [Member] | Maximum [Member]    
Market capitalization   1,000,000,000
Payments to milestone   $ 10,000,000
Milestone Period Three [Member]    
Number of trading days | Integer   10
Number of consecutive trading days | Integer   20
Market capitalization   $ 1,000,000,000
Payments to milestone   $ 25,000,000
Milestone Period Four [Member]    
Number of trading days | Integer   10
Number of consecutive trading days | Integer   20
Increase in market capitalization   $ 1,000,000,000
Milestone Period Four [Member] | Maximum [Member]    
Payments to milestone   $ 25,000,000