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Basis of Presentation, Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Tables)
12 Months Ended
Dec. 31, 2021
Accounting Policies [Abstract]  
Property, Plant and Equipment
The estimated useful lives to calculate depreciation and amortization of property, plant, and equipment and leasehold improvements consisted of the following:

Asset CategoryYears
Equipment5 years
Vehicles5 years
Leasehold improvements
Shorter of the lease term or 15 years
Furniture and fixtures5 years
Computers software and related equipment
3 to 5 years
Property and equipment, net for the year ended December 31, 2021 and 2020 consisted of the following (in thousands):
December 31, 2021December 31, 2020
Equipment$5,244 $957 
Furniture & fixtures
141 11 
Company vehicles
153 320 
Leasehold improvements
626 29 
Computers, software and related equipment
1,289 444 
Construction in progress1,444 — 
Property and Equipment, gross8,897 1,761 
Accumulated depreciation
(1,471)(677)
Property and Equipment, net$7,426 $1,084 
Reconciliation of the change in the product liability balances
The reconciliation of the change in the Company’s product liability balances for the years ended December 31, 2021 and 2020 consisted of the following (in thousands):
December 31, 2021December 31, 2020
Warranty liability, beginning of period$— $— 
Reduction in liability (payments) $— $— 
Increase in liability (new warranties)$177 $— 
Warranty liability, end of period$177 $—