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Property and equipment, net
6 Months Ended
Jun. 30, 2022
Property, Plant and Equipment [Abstract]  
Property and equipment, net Property and equipment, net
Property and equipment, net consisted of the following (in thousands):
June 30,December 31,
20222021
Quantum computer systems$13,425 $13,425 
Lab equipment6,681 6,645 
Computer equipment3,352 3,305 
Leasehold improvements1,075 1,074 
Furniture and fixtures318 316 
Construction-in-progress374 285 
Total property and equipment25,225 25,050 
Less: Accumulated depreciation(22,453)(21,801)
Property and equipment, net$2,772 $3,249 
Depreciation expense for the three month period ended June 30, 2022 and 2021 was $309,000 and $344,000 respectively. Depreciation expense for the six month period ended June 30, 2022 and 2021 was $705,000 and $747,000 respectively. The Company has not acquired any property and equipment under capital leases.