Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
Cash flows from operating activities:
Net loss	$ (146,774)	$ (88,333)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,987	805
Amortization of operating lease right-of-use assets	1,610	885
Amortization of premium (discount) on marketable securities	(743)	444
Loss on marketable securities	3,033	0
Change in fair value of private warrants	1,054	3,857
Vendor stock-in-lieu of cash program	5,684	7,848
Amortization of debt discount and issuance costs	809	809
Inventory write-offs and write-downs	5,451	1,356
Share-based compensation	55,954	26,698
Product warranty and other	586	107
Changes in operating assets and liabilities:
Accounts receivable	(9,877)	9,757
Inventories	(11,578)	(768)
Prepaid expenses and other current assets	9,932	(3,300)
Other non-current assets	(4,156)	158
Accounts payable	11,191	5,983
Accrued and other current liabilities	11,651	1,200
Other non-current liabilities	(1,488)	(343)
Net cash used in operating activities	(64,674)	(32,837)
Cash flows from investing activities:
Acquisition of Seagate’s lidar business	(12,608)	0
Purchases of marketable securities	(81,623)	(193,687)
Proceeds from maturities of marketable securities	148,345	91,454
Proceeds from sales/redemptions of marketable securities	20,165	12,842
Purchases of property and equipment	(11,680)	(5,004)
Net cash provided by (used in) investing activities	62,599	(94,395)
Cash flows from financing activities:
Net proceeds from issuance of Class A common stock under the Equity Financing Program	22,665	0
Proceeds from exercise of stock options	1,036	1,092
Payments of employee taxes related to stock-based awards	(572)	(516)
Repurchase of common stock	0	(43,920)
Net cash provided by (used in) financing activities	23,129	(43,344)
Net increase (decrease) in cash, cash equivalents and restricted cash	21,054	(170,576)
Beginning cash, cash equivalents and restricted cash	71,105	330,702
Ending cash, cash equivalents and restricted cash	92,159	160,126
Supplemental disclosures of noncash investing and financing activities:
Issuance of Class A common stock upon exercise of warrants	0	18,689
Operating lease right-of-use assets obtained in exchange for lease obligations	1,211	5,746
Purchases of property and equipment recorded in accounts payable and accrued liabilities	7,978	1,950
Vendor stock-in-lieu of cash program—advances for capital projects and equipment	$ 2,520	$ 0