Quarterly report pursuant to Section 13 or 15(d)

Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details)

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Accrued Expenses and Other Current Liabilities - Schedule of Accrued Expenses and Other Current Liabilities (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Payables And Accruals [Abstract]    
Payroll and related costs $ 2,007 $ 3,177
Professional and consulting fees 884 802
Guarantee liability 772 422
Other research and development costs 258 243
Interest payable 130 126
Stock-based compensation 111  
Other 518 556
Total accrued expenses and other current liabilities $ 4,680 $ 5,326