CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Cash flows from operating activities:
Net loss	$ (78,719)	$ (71,129)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,741	2,103
Impairment of inventories	559	102
Change in fair value of warrant liability	(3,080)	(28)
Stock-based compensation	10,625	13,004
Amortization of right-of-use assets	1,703	1,498
Amortization of premium and accretion of discount on available-for-sale securities, net	(2,096)	(1,420)
Other	118	0
Changes in operating assets and liabilities:
Accounts receivable	(216)	2,019
Inventories	(1,184)	61
Other current assets	(3,156)	(352)
Other noncurrent assets	317	(5)
Accounts payable	199	85
Accrued liabilities	288	(6,738)
Accrued employee costs	(2,999)	(1,205)
Lease liability	(1,749)	(1,459)
Other current liabilities	16,522	45
Net cash used in operating activities	(60,127)	(63,419)
Cash flows from investing activities:
Purchase of property, plant and equipment	(2,427)	(2,388)
Purchase of available-for-sale securities	(52,072)	(74,126)
Proceeds from maturities of available-for-sale securities	99,940	107,094
Net cash provided by investing activities	45,441	30,580
Cash flows from financing activities:
Payments of taxes withheld on net settled vesting of restricted stock units	(293)	(20)
Proceeds from exercise of stock options	54	116
Net cash (used in) provided by financing activities	(239)	96
Net decrease in cash and cash equivalents	(14,925)	(32,743)
Beginning cash and cash equivalents	38,547	67,420
Ending cash and cash equivalents	23,622	34,677
Supplemental disclosures of cash flow information:
Cash paid for interest	0	0
Cash paid for income taxes	(66)	0
Supplemental disclosures of non-cash investing and financing activities:
Unpaid property, plant and equipment purchases	$ 113	$ 812