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Property and Equipment, Net
 9 Months Ended
Sep. 30, 2021
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net Property and Equipment, Net
Property and equipment, net consisted of the following:
September 30,December 31,
20212020
(In thousands)
Computers and software$1,075 $510 
R&D lab equipment1,266 469 
Furniture and fixtures69 40 
Leasehold improvements1,999 1,828 
Construction in progress3,003 — 
Total property, plant and equipment7,412 2,847 
Less accumulated depreciation and amortization(2,411)(1,841)
Property, plant and equipment, net$5,001 $1,006 
Depreciation expense for the three months ended and nine months ended September 30, 2021 and 2020 was $0.4 million for both three months periods, $0.8 million and $0.7 million, respectively.