Quarterly report pursuant to Section 13 or 15(d)

Financial Instruments Fair Value Measurements - Schedule of Financial Liabilities Measured at Fair Value on Recurring Basis (Details)

v3.21.1
Financial Instruments Fair Value Measurements - Schedule of Financial Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Fair value of liability [1] $ 14,660
November 2019 Senior Secured Convertible Notes [Member]    
Fair value of liability [1] 1,270
April 2020 Senior Convertible Notes [Member]    
Fair value of liability [1] 4,600
August 2020 Senior Secured Convertible Notes [Member]    
Fair value of liability [1] 8,790
Fair Value, Inputs, Level 1 [Member]    
Fair value of liability [1]
Fair Value, Inputs, Level 1 [Member] | November 2019 Senior Secured Convertible Notes [Member]    
Fair value of liability [1]
Fair Value, Inputs, Level 1 [Member] | April 2020 Senior Convertible Notes [Member]    
Fair value of liability [1]
Fair Value, Inputs, Level 1 [Member] | August 2020 Senior Secured Convertible Notes [Member]    
Fair value of liability [1]
Fair Value, Inputs, Level 2 [Member]    
Fair value of liability [1]
Fair Value, Inputs, Level 2 [Member] | November 2019 Senior Secured Convertible Notes [Member]    
Fair value of liability [1]
Fair Value, Inputs, Level 2 [Member] | April 2020 Senior Convertible Notes [Member]    
Fair value of liability [1]
Fair Value, Inputs, Level 2 [Member] | August 2020 Senior Secured Convertible Notes [Member]    
Fair value of liability [1]
Fair Value, Inputs, Level 3 [Member]    
Fair value of liability [1] 14,660
Fair Value, Inputs, Level 3 [Member] | November 2019 Senior Secured Convertible Notes [Member]    
Fair value of liability [1] 1,270
Fair Value, Inputs, Level 3 [Member] | April 2020 Senior Convertible Notes [Member]    
Fair value of liability [1] 4,600
Fair Value, Inputs, Level 3 [Member] | August 2020 Senior Secured Convertible Notes [Member]    
Fair value of liability [1] $ 8,790
[1] As noted above, as presented in the fair value hierarchy table, Level-1 represents quoted prices in active markets for identical items, Level-2 represents significant other observable inputs, and Level-3 represents significant unobservable inputs.