Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements. (Details) - Schedule of fair values of warrants based on unobservable inputs

v3.21.1
Fair Value Measurements. (Details) - Schedule of fair values of warrants based on unobservable inputs
$ in Thousands
 12 Months Ended
Dec. 31, 2020
USD ($)
Warrants to Senior Noteholders [Member]  
Fair Value Measurements. (Details) - Schedule of fair values of warrants based on unobservable inputs [Line Items]  
Balance, December 31, 2019 $ 977
Issuance of warrants in October offering
Exercise of warrants/reclass to equity (8,474)
Adjustments to fair value for the period 7,497
Balance, December 31, 2020
Pre-funded Warrants [Member]  
Fair Value Measurements. (Details) - Schedule of fair values of warrants based on unobservable inputs [Line Items]  
Balance, December 31, 2019
Issuance of warrants in October offering 23,638
Exercise of warrants/reclass to equity (21,917)
Adjustments to fair value for the period (1,721)
Balance, December 31, 2020
Other Warrants [Member]  
Fair Value Measurements. (Details) - Schedule of fair values of warrants based on unobservable inputs [Line Items]  
Balance, December 31, 2019
Issuance of warrants in October offering 27,048
Exercise of warrants/reclass to equity (31,231)
Adjustments to fair value for the period 4,183
Balance, December 31, 2020