CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Cash flows from operating activities:
Net loss	$ (33,157)	$ (19,458)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	630	215
Change in fair value of warrant liability	(634)	(668)
Stock-based compensation	5,784	4,513
Impairment of inventories	767	0
Amortization of right-of-use assets	707	223
Amortization of premium on available-for-sale securities	435	0
Changes in operating assets and liabilities:
Accounts receivable	2,130	(104)
Inventories	(312)	(310)
Other current assets	403	(258)
Other noncurrent assets	(1)	(296)
Accounts payable	1,890	964
Accrued liabilities	(2,653)	872
Accrued employee costs	(1,332)	(358)
Lease liability	(696)	(141)
Other current liabilities	(499)	9
Net cash used in operating activities	(26,538)	(14,797)
Cash flows from investing activities:
Purchase of property, plant and equipment	(1,283)	(669)
Purchase of available-for-sale securities	(82,284)	(53,501)
Proceeds from maturities of available-for-sale securities	105,607	0
Net cash provided by (used in) investing activities	22,040	(54,170)
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	(47,228)
Proceeds from exercise of warrants	1	0
Proceeds from exercise of stock options	186	198
Net cash provided by financing activities	187	513,747
Net increase (decrease) in cash and cash equivalents	(4,311)	444,781
Beginning cash and cash equivalents	66,810	24,624
Ending cash and cash equivalents	62,499	469,405
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	1,265	215
Taxes withheld on net settled vesting of restricted stock units	244	0
Offering costs included in accounts payable and accrued liabilities	0	534
Private placement of warrants acquired as part of merger	0	3,014
Right-of-use assets obtained in exchange for lease liability	0	4,692
Non-cash lease adoption	$ 0	$ 1,665