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
Jun. 30, 2021
Dec. 31, 2020
Payables And Accruals [Abstract]    
Payroll and related costs $ 2,528 $ 3,177
Professional and consulting fees 880 802
Guarantee liability 620 422
Other research and development costs 247 243
Interest payable 113 126
Stock-based compensation 111 0
Other 585 556
Total accrued expenses and other current liabilities $ 5,084 $ 5,326