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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 consists of the following as of December 31, 2021 and 2020:
December 31,
2021		December 31,
2020
Laboratory equipment$6,725 $6,520 
Leasehold improvements1,906 1,886 
Computer equipment and office equipment1,019 959 
Total property and equipment at cost9,650 9,365 
Less: Accumulated depreciation(7,682)(7,635)
$1,968 $1,730 
The Company recorded assets under finance leases of $609, $0, and $429 as property and equipment during the years ended December 31, 2021, 2020 and 2019, respectively. Financing leases are discussed in more detail in Note 10, Leases. Depreciation expense for the years ended December 31, 2021, 2020 and 2019 was $855, $1,010 and $1,245, respectively.