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Property and Equipment
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Property and Equipment Property and Equipment
Property and equipment consisted of the following:
December 31, 2021December 31, 2020
Laboratory equipment$2,626 $759 
Furniture and fixtures, office equipment and software1,081 804 
Leasehold improvements364 291 
Property and equipment, gross4,071 1,854 
Less: accumulated depreciation3,377 1,129 
Property and equipment, net$694 $725 

Depreciation expense for the years ended December 31, 2021 and 2020 was $330 and $302, respectively.