CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (97,045)	$ (374,110)
Adjustments to reconcile net loss to net cash used in operating activities:
Goodwill impairment charges	0	166,675
Depreciation and amortization	9,836	17,148
Loss on write-off and disposal of property and equipment and right-of-use asset impairment	401	1,673
Gain on lease termination	0	(807)
Stock-based compensation	40,459	57,725
Reduction of revenue related to stock warrant issued to customer	892	528
Amortization of right-of-use asset	4,904	4,519
Interest expense and loss on debt extinguishment	0	4,001
Amortization of debt issuance costs and debt discount	0	190
Non-cash interest income	(619)	(732)
Accretion or amortization on short-term investments	(5,095)	(4,685)
Change in fair value of warrant liabilities	(103)	49
Inventory write down	2,080	10,047
Provision (recovery of) for doubtful accounts	(587)	1,346
Realized gain on sale of investments	(275)	0
Changes in operating assets and liabilities:
Accounts receivable	(1,724)	3,574
Inventory	4,735	(4,047)
Prepaid expenses and other assets	21,317	(21,575)
Accounts payable	2,476	(8,520)
Accrued and other liabilities	(28,059)	8,081
Contract liabilities	19,036	6,597
Operating lease liability	(6,323)	(5,567)
Net cash used in operating activities	(33,694)	(137,890)
CASH FLOWS FROM INVESTING ACTIVITIES
Proceeds from sale of property & equipment	668	560
Purchases of property and equipment	(3,756)	(3,006)
Purchase of short-term investments	(144,573)	(137,104)
Proceeds from sales of short-term investments	162,313	158,014
Cash and cash equivalents acquired in the Velodyne Merger	0	32,137
Net cash provided by investing activities	14,652	50,601
CASH FLOWS FROM FINANCING ACTIVITIES
Proceeds from exercise of stock options	205	271
Proceeds from ESPP purchase	1,703	1,174
Proceeds from borrowings, net of debt discount and issuance costs	0	43,975
Repayments of borrowings	(43,975)	(43,975)
Proceeds from the issuance of common stock under at-the-market offering, net of commissions and fees	57,806	14,575
At-the-market offering costs for the issuance of common stock	(346)	(363)
Net cash provided by financing activities	15,393	15,657
Effect of exchange rates on cash and cash equivalents	(887)	(12)
Net increase decrease in cash, cash equivalents and restricted cash	(4,536)	(71,644)
Cash, cash equivalents and restricted cash at beginning of year	52,634	124,278
Cash, cash equivalents and restricted cash at end of year	48,099	52,634
SUPPLEMENTAL DISCLOSURES OF OPERATING ACTIVITIES:
Cash paid for interest	2,073	5,115
SUPPLEMENTAL DISCLOSURES OF NON-CASH INVESTING AND FINANCING INFORMATION:
Property and equipment purchases included in accounts payable and accrued liabilities	480	524
Common stock shares issued in the Velodyne Merger	0	297,425
Common stock warrants issued in the Velodyne Merger	$ 0	$ 9,177