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Financial Statement Components (Tables)
 3 Months Ended
Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Schedule of Cash and Cash Equivalents Cash and cash equivalents consisted of the following (in thousands):
 March 31, 2022December 31, 2021
Cash$31,744 $303,373 
Money market funds47,497 25,654 
U.S. treasury securities19,997 — 
Commercial paper60,178 950 
Total cash and cash equivalents$159,416 $329,977 
Schedule of Inventories, net
Inventories consisted of the following (in thousands):
 March 31, 2022December 31, 2021
Raw materials$6,535 $5,866 
Work-in-process2,265 1,171 
Finished goods1,212 3,305 
Total inventories, net$10,012 $10,342 
Schedule of Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets consisted of the following (in thousands):
 March 31, 2022December 31, 2021
Prepaid expenses$15,893 $14,651 
Contract assets14,772 9,907 
Advance payments to vendors4,417 1,810 
Other receivables2,463 2,827 
Total prepaid expenses and other current assets$37,545 $29,195 
Schedule of Property and Equipment and Property and Equipment Capitalized Under Finance Lease (Capital Lease Prior to Adoption of ASC 842)
Property and equipment consisted of the following (in thousands):
 March 31, 2022December 31, 2021
Machinery and equipment$8,286 $7,694 
Computer hardware and software2,871 2,854 
Leasehold improvements885 869 
Vehicles, including demonstration fleet2,631 2,421 
Furniture and fixtures829 272 
Construction in progress8,454 3,677 
Total property and equipment23,956 17,787 
Accumulated depreciation and amortization(7,519)(6,778)
Total property and equipment, net$16,437 $11,009 
Property and equipment capitalized under finance lease (capital lease prior to adoption of ASC 842) were not material.
Schedule of Finite-Lived Intangible Assets
The following table summarizes the activity in the Company’s intangible assets during the three months ended March 31, 2022 (in thousands):
Three Months
Ended
March 31, 2022
Beginning of the period$2,424 
Amortization(63)
End of the period$2,361 
The components of intangible assets were as follows (in thousands):
March 31, 2022December 31, 2021
Gross
Carrying
 Amount		Accumulated
Amortization		Net
Carrying
Amount		Weighted Average
Remaining Period
(Years)		Gross
Carrying
 Amount		Accumulated
Amortization		Net
Carrying
Amount		Weighted
Average
Remaining
Period
(Years)
Customer relationships$780 $(52)$728 9.3$780 $(33)$747 9.6
Tradename120 (120)— — 120 (120)— — 
Developed technology1,750 (117)1,633 9.31,750 (73)1,677 9.6
Total intangible assets$2,650 $(289)$2,361 9.3$2,650 $(226)$2,424 9.6
Schedule of Future Amortization Expense As of March 31, 2022, the expected future amortization expense for intangible assets was as follows (in thousands):
PeriodExpected Future
Amortization Expense
Remaining 2022$190 
2023253 
2024253 
2025253 
2026253 
Thereafter1,159 
Total$2,361 
Schedule of Goodwill
The carrying amount of goodwill allocated to the Company’s reportable segments was as follows (in thousands):
 Autonomy SolutionsComponentsTotal
As of March 31, 2022$687 $2,258 $2,945 
As of December 31, 2021$687 $2,423 $3,110 
Schedule of Other Noncurrent Assets
Other non-current assets consisted of the following (in thousands):
 March 31, 2022December 31, 2021
Security deposits$2,574 $1,187 
Non-marketable equity investment10,002 10,002 
Other non-current assets1,097 1,266 
Total other non-current assets$13,673 $12,455 
Schedule of Accrued and Other Current Liabilities
Accrued and other current liabilities consisted of the following (in thousands): 
 March 31, 2022December 31, 2021
Accrued compensation and benefits$13,755 $9,899 
Accrued expenses6,431 6,727 
Warranty reserves1,401 1,798 
Accrued interest payable2,242 316 
Other1,019 1,104 
Total accrued and other current liabilities$24,848 $19,844