Quarterly report pursuant to Section 13 or 15(d)

Supplemental Balance Sheet Information, Accrued Expenses (Details)

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Supplemental Balance Sheet Information, Accrued Expenses (Details) - USD ($)
$ in Thousands
Mar. 31, 2022
Dec. 31, 2021
Accrued Expenses [Abstract]    
R&D services and supplies $ 962 $ 1,081
Payroll 193 488
Professional services 189 84
Other 75 80
Total $ 1,419 $ 1,733