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Notes Payable - Schedule of Derivative Liability Activity (Details) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2021
Dec. 31, 2020
Debt Disclosure [Abstract]    
Balance of derivative liability beginning $ 246
Change in fair value recognized in non-operating income (expense) 67 (309)
Balance of derivative liability ending $ 313 $ 246