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Financial Statement Components
 12 Months Ended
Dec. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]  
Financial Statement Components Financial Statement Components
Cash and Cash Equivalents
Cash and cash equivalents consisted of the following (in thousands):
 December 31,
 20222021
Cash$27,496 $303,373 
Money market funds42,056 25,654 
Commercial paper— 950 
Total cash and cash equivalents$69,552 $329,977 
Inventory
Inventory consisted of the following (in thousands):
 December 31,
 20222021
Raw materials$3,614 $5,866 
Work-in-process2,329 1,171 
Finished goods2,849 3,305 
Total inventory$8,792 $10,342 
The Company’s inventory write-offs and write-downs (primarily due to obsolescence, lower of cost or market assessment, and other adjustments) was $12.2 million, $2.9 million and $4.4 million during the years ended December 31, 2022, 2021 and 2020, respectively.
Prepaid Expenses and Other Current Assets
Prepaid expenses and other current assets consisted of the following (in thousands):
 December 31,
 20222021
Prepaid expenses$15,653 $14,651 
Contract assets15,395 9,907 
Advance payments to vendors7,919 1,810 
Other receivables5,236 2,827 
Total prepaid expenses and other current assets$44,203 $29,195 
Property and Equipment
Property and equipment consisted of the following (in thousands):
 December 31,
 20222021
Machinery and equipment$14,047 $7,694 
Computer hardware and software6,797 2,854 
Land1,001 — 
Leasehold improvements885 869 
Vehicles, including demonstration fleet3,222 2,421 
Furniture and fixtures818 272 
Construction in progress13,642 3,677 
Total property and equipment40,412 17,787 
Accumulated depreciation and amortization(10,152)(6,778)
Total property and equipment, net$30,260 $11,009 
Property and equipment capitalized under finance lease (capital lease prior to adoption of ASC 842) were not material. Construction in progress increased due to increased capital expenditure related to capital projects to enable the Company to achieve series production readiness.
Depreciation and amortization associated with property and equipment was $4.3 million, $3.9 million and $2.5 million for the years ended December 31, 2022, 2021 and 2020, respectively.

Intangible Assets
The following table summarizes the activity in the Company’s intangible assets (in thousands):
December 31,
20222021
Beginning of the period$2,424 $— 
Additions21,890 2,650 
Amortization(2,237)(226)
End of the period$22,077 $2,424 
Intangible assets were acquired in connection with the Company’s acquisition of Optogration in August 2021, Freedom Photonics in April 2022 and Solfice in June 2022. See Note 3 for further details of these acquisitions. The components of intangible assets were as follows (in thousands):
December 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$3,730 $(664)$3,066 4.4$780 $(33)$747 9.6
Customer backlog650 (292)358 0.9— — — — 
Tradename620 (214)406 3.3120 (120)— — 
Assembled workforce130 (130)— — — — — — 
Developed technology11,910 (1,163)10,747 7.51,750 (73)1,677 9.6
IPR&D7,500 — 7,500 — — — — — 
Total intangible assets$24,540 $(2,463)$22,077 6.6$2,650 $(226)$2,424 9.6
Amortization expense related to intangible assets was $2.2 million, $0.2 million and $0.0 million for the year ended December 31, 2022, 2021 and 2020, respectively.
As of December 31, 2022, the expected future amortization expense for intangible assets was as follows (in thousands):
PeriodExpected Future
Amortization Expense
2023$2,730 
20242,373 
20252,373 
20261,726 
20271,510 
Thereafter3,865 
IPR&D7,500 
Total$22,077 
Goodwill
The carrying amount of goodwill allocated to the Company’s reportable segments was as follows (in thousands):
 Autonomy SolutionsATSTotal
Balance as of December 31, 2021
$687 $2,423 $3,110 
Acquired goodwill related to Freedom Photonics in 2022— 15,885 15,885 
Purchase accounting adjustments— (179)(179)
Balance as of December 31, 2022
$687 $18,129 $18,816 
Other Non-Current Assets
Other non-current assets consisted of the following (in thousands):
 December 31,
 20222021
Security deposits$5,495 $1,187 
Non-marketable equity investment4,000 10,002 
Advance payment for capital projects27,683 — 
Contract assets2,575 — 
Other non-current assets591 1,266 
Total other non-current assets$40,344 $12,455 
Accrued and Other Current Liabilities
Accrued and other current liabilities consisted of the following (in thousands): 
 December 31,
 20222021
Accrued compensation and benefits$16,682 $9,899 
Accrued expenses22,358 6,727 
Warranty reserves3,584 1,798 
Contract liabilities1,993 898 
Accrued interest payable359 316 
Contract losses7,526 115 
Other460 91 
Total accrued and other current liabilities$52,962 $19,844 
During the year ended December 31, 2022, the Company recorded $19.2 million in cost of sales (services) estimated losses expected to be incurred on NRE projects with certain customers. Estimated contract losses in the year ended December 31, 2021 and 2020 were not material. The estimated contract losses recorded in 2022 were primarily a result of (a) changes in estimates related to costs expected to be incurred for contractual milestones based on actual experience on similar projects and (b) changes in scope of project deliverables agreed upon with the respective customers during the year.