Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 48,386	$ 53,208
Short-term investments	303,708	368,031
Accounts receivable, net	4,735	4,315
Related party receivables	1,383	1,804
Other receivables	1,065	899
Inventory	3,718	4,627
Prepaid expenses and other current assets	4,380	2,098
Total current assets	367,375	434,982
Long-term investments	58,416	5,157
Operating lease right-of-use assets	26,944	27,003
Property and equipment, net	18,675	19,408
Restricted cash	524	524
Other assets	853	855
Total assets	472,787	487,929
Current liabilities:
Accounts payable	1,956	2,104
Accrued expenses	7,175	8,298
Deferred revenue	263	133
Operating lease liabilities, current	2,188	1,842
Other current liabilities	172	207
Total current liabilities	11,754	12,584
Operating lease liabilities, net of current portion	27,684	28,032
Other noncurrent liabilities	360	320
Total liabilities	39,798	40,936
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.00001 par value; 5,000,000 shares authorized as of March 31, 2023 and December 31, 2022; zero shares issued and outstanding as of March 31, 2023 and December 31, 2022	0	0
Additional paid-in capital	676,536	667,739
Accumulated other comprehensive loss	(93)	(1,251)
Accumulated deficit	(243,455)	(219,496)
Total stockholders’ equity	432,989	446,993
Total liabilities and stockholders’ equity	472,787	487,929
Class A common stock
Stockholders’ equity:
Common stock	1	1
Class B common stock
Stockholders’ equity:
Common stock	$ 0	$ 0