CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023
Cash flows from operating activities:
Net loss	$ (54,391)	$ (89,579)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation, amortization, and impairments	7,835	8,332
Non-cash interest expense	926
Write-down of inventories	15
Stock-based compensation expense	15,794	20,924
Change in fair value of warrant liabilities	826	(3,924)
Gain on lease termination		(214)
Other	945	(478)
Changes in operating assets and liabilities:
Accounts receivable	(8,158)	711
Inventories	(264)	(34,046)
Prepaid expenses and other assets	681	2,354
Vendor advances	(1,342)	15,646
Accounts payable	(1,440)	1,092
Deferred revenue	441	(423)
Accrued purchase commitments		(1,934)
Change in operating lease assets and liabilities	(549)	(671)
Accrued expenses and other liabilities	94	(3,509)
Net cash used in operating activities	(38,587)	(85,719)
Cash flows from investing activities:
Purchases of marketable securities		(297)
Sales of marketable securities		76,484
Purchases of property, equipment, and intangible assets, including capitalized software	(2,286)	(3,271)
Sales of property and equipment	36	10
Net cash (used in) provided by investing activities	(2,250)	72,926
Cash flows from financing activities:
Proceeds from exercise of stock options and warrants		228
Net cash provided by financing activities		228
Net decrease in cash, cash equivalents, and restricted cash	(40,837)	(12,565)
Cash, cash equivalents, and restricted cash, beginning of period	138,650	166,828
Cash, cash equivalents, and restricted cash, end of period	$ 97,813	$ 154,263