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Accrued Expenses - Schedule of Current Accrued Expenses (Details) - USD ($)
$ in Thousands
Dec. 31, 2021
Dec. 31, 2020
Payables and Accruals [Abstract]    
Clinical expenses $ 1,517 $ 2,698
Compensation, excluding taxes 893 1,598
Short-term financing 551 382
Professional fees 603 225
Interest on Rosalind convertible note 393 234
Other 152 104
Total accrued expenses $ 4,109 $ 5,241