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Notes Payable - Schedule Future Maturities of Term Loans, Including Final Payment Fee (Details)
$ in Thousands
Mar. 31, 2021
USD ($)
Debt Disclosure [Abstract]  
Remainder of 2021 $ 1,667
Year ending December 31, 2022 3,333
Year ending December 31, 2023 3,333
Year ending December 31, 2024 2,117
Debt instrument carrying amount including unaccreted liability for final payment fee 10,450
Unaccreted balance for Final Payment fee on Term Loans (239)
Less: unamortized discount (205)
Total 10,006
Less current portion (2,500)
Noncurrent portion $ 7,506