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Property and Equipment, Net (Tables)
 9 Months Ended
Sep. 30, 2022
Property, Plant and Equipment [Abstract]  
Summary of Property and Equipment
Property and equipment, net, consisted of the following (in thousands):
 September 30, 2022December 31, 2021
Leasehold improvements$9,190 $9,052 
Laboratory and clean room equipment16,302 16,567 
Furniture and equipment14,997 14,975 
Construction in progress1,383 397 
Asset retirement cost982 863 
Finance lease right-of-use asset189 189 
Property and equipment, gross43,043 42,043 
Less: accumulated depreciation and amortization(35,131)(32,878)
Property and equipment, net$7,912 $9,165 
Schedule of Depreciation Expense
Depreciation expense for the three and nine months ended September 30, 2022 and 2021 is summarized in the table below (in thousands):
Three Months Ended September 30,Nine Months Ended September 30,
2022202120222021
Depreciation expense$831 $923 $2,549 $3,390