Quarterly report pursuant to Section 13 or 15(d)

Fair Value - Fair Value Liability Reconciliation (Details)

v3.21.2
Fair Value - Fair Value Liability Reconciliation (Details) - Recurring - Level 2 - USD ($)
$ in Thousands
Sep. 30, 2021
Dec. 31, 2020
Fair value liability reconciliation    
Derivative Liability, Current $ 4,106 $ 4,075
Derivative Liability, Noncurrent $ 5,043 $ 8,998