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Property and equipment
 12 Months Ended
Dec. 31, 2023
Property, Plant and Equipment [Abstract]  
Property and equipment Property and equipment
Property and equipment consists of the following as of December 31, 2023 and 2022:
(in thousands)December 31,
2023		December 31,
2022
Laboratory equipment$8,246 $7,960 
Leasehold improvements2,206 1,943 
Computers, software, and office equipment2,449 1,824 
Total property and equipment at cost12,901 11,727 
Less: Accumulated depreciation(9,070)(7,742)
$3,831 $3,985 
Depreciation expense for the years ended December 31, 2023, 2022 and 2021 was $1.5 million, $0.9 million and $0.9 million, respectively.