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Accrued expenses (Tables)
12 Months Ended
Dec. 31, 2021
Accrued Liabilities, Current [Abstract]  
Schedule of accrued expenses
Accrued expenses consist of the following as of December 31, 2021 and 2020:
December 31,
2021
December 31,
2020
Accrued manufacturing expenses$8,476 $4,157 
Accrued clinical expenses7,879 5,126 
Accrued payroll and related expenses7,319 5,412 
Accrued preclinical expenses3,848 619 
Accrued professional fees909 757 
Accrued other285 75 
$28,716 $16,146