Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - summary of changes in fair value of the Company's derivative liability measured at fair value using significant unobservable inputs (Level 3) (Details)

v3.20.4
Fair Value Measurements - summary of changes in fair value of the Company's derivative liability measured at fair value using significant unobservable inputs (Level 3) (Details) - Derivative Liability [Member] - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Beginning balance $ 387 $ 0
Additions 0 216
Change in fair value 0 171
Ending balance $ 387 $ 387