CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 93,822	$ 84,319
Marketable securities	180,803	266,990
Accounts receivable, net of allowance for estimated credit losses of $0 and $0, respectively	466	0
Inventory, net	2,325	0
Prepaid expenses and other current assets	7,392	6,873
Total current assets	284,808	358,182
Property and equipment, net	17,606	16,849
Internally developed software	627	0
Operating lease right-of-use assets	14,354	15,757
Other assets	701	697
Total assets	318,096	391,485
Current liabilities:
Accounts payable	2,056	3,903
Accrued expenses and other current liabilities	7,428	10,434
Current portion of operating lease liabilities	1,523	1,369
Total current liabilities	11,007	15,706
Warrant liabilities	1,077	996
Other long-term liabilities	19	0
Operating lease liabilities	13,928	16,077
Total liabilities	26,031	32,779
Commitments and contingencies (Note 15)
Stockholders' equity
Additional paid-in capital	765,637	758,366
Accumulated deficit	(473,586)	(399,674)
Total stockholders' equity	292,065	358,706
Total liabilities and stockholders' equity	318,096	391,485
Class A Common Stock [Member]
Stockholders' equity
Common Stock	12	12
Class B Common Stock [Member]
Stockholders' equity
Common Stock	$ 2	$ 2