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Property and Equipment, Net
3 Months Ended
Mar. 31, 2023
Property, Plant and Equipment [Abstract]  
Property and Equipment, Net Property and Equipment, Net
Property and equipment, net consists of the following:
Useful life (in years)March 31, 2023December 31, 2022
Production tooling4$12,888 $10,851 
Lab equipment49,308 6,382 
Office equipment
3 - 7
5,203 4,736 
Leasehold improvements*1,463 1,216 
Construction in progress2,341 1,763 
Property and equipment, gross31,203 24,948 
Less: Accumulated depreciation10,091 9,119 
Property and equipment, net$21,112 $15,829 
*Leasehold improvements are amortized over the shorter of the remaining lease term or estimated useful life of the leasehold improvement.
The Company recognized depreciation expense of $955 and $760 for the three months ended March 31, 2023 and 2022, respectively.

Fixed assets not yet in service consist primarily of capitalized internal-use software and certain tooling and other equipment that have not been placed into service.