CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Cash flows from operating activities:
Net loss	$ (104,631)	$ (70,136)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	2,305	741
Loss on write down of fixed assets	0	52
Change in fair value of warrant liability	(922)	(1,904)
Stock-based compensation	18,358	16,045
Impairment of inventories	1,363	0
Amortization of right-of-use assets	2,147	1,204
Realized loss on available-for-sale securities	29	0
Amortization of premium on available-for-sale securities	641	960
Changes in operating assets and liabilities:
Accounts receivable	(1,046)	(1,072)
Inventories	(580)	(2,118)
Other current assets	(615)	(6,673)
Other noncurrent assets	(4)	(791)
Accounts payable	1,751	3,275
Accrued liabilities	(456)	3,343
Accrued employee costs	1,283	771
Lease liability	(2,133)	(1,101)
Other current liabilities	(583)	247
Net cash used in operating activities	(83,093)	(57,157)
Cash flows from investing activities:
Purchase of property, plant and equipment	(5,967)	(2,241)
Purchase of available-for-sale securities	(143,730)	(454,357)
Proceeds from sale of available-for-sale securities	0	20,122
Proceeds from maturities of available-for-sale securities	284,176	62,980
Net cash provided by (used in) investing activities	134,479	(373,496)
Cash flows from financing activities:
Proceeds from business combination and private offering	0	560,777
Transaction costs related to business combination and private offering	0	(47,487)
Payments of taxes withheld on net settled vesting of restricted stock units	(613)	(495)
Proceeds from exercise of warrants	1	0
Proceeds from exercise of stock options	301	690
Net cash provided by (used in) financing activities	(311)	513,485
Net increase (decrease) in cash and cash equivalents	51,075	82,832
Beginning cash and cash equivalents	66,810	24,624
Ending cash and cash equivalents	117,885	107,456
Supplemental disclosures of cash flow information:
Cash paid for interest	0	0
Cash paid for income taxes	0	0
Supplemental disclosures of non-cash investing and financing activities:
Changes in purchases of property and equipment recorded in accounts payable and accrued liabilities	(97)	693
Taxes withheld on net settled vesting of restricted stock units	107	843
Private placement of warrants acquired as part of merger	0	3,014
Right-of-use assets obtained in exchange for lease liability	0	10,515
Non-cash lease adoption	$ 0	$ 1,671