Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 232,813	$ 333,585
Short-term investments	167,261	98,278
Accounts receivable, net	2,495	0
Related party receivables	1,283	99
Other receivables	366	163
Inventory	4,145	551
Prepaid expenses and other current assets	3,336	452
Total current assets	411,699	433,128
Long-term investments	93,186	0
Operating lease right-of-use assets	20,142	0
Property and equipment, net	13,087	8,441
Restricted cash	524	343
Other assets	501	407
Total assets	539,139	442,319
Current liabilities:
Accounts payable	3,789	2,115
Accrued expenses	7,371	5,147
Accrued research and development	1,023	396
Deferred revenue	376	250
Deferred rent, current	0	186
Operating lease liabilities, current	864	0
Total current liabilities	13,423	8,094
Deferred rent, net of current portion	0	1,899
Operating lease liabilities, net of current portion	22,459	0
Other noncurrent liabilities	341	717
Total liabilities	36,223	10,710
Commitments and contingencies (Note 9)
Stockholders’ equity:
Preferred stock, $0.00001 par value; 5,000,000 shares authorized as of December 31, 2021 and 2020; zero shares issued and outstanding as of December 31, 2021 and 2020	0	0
Additional paid-in capital	629,981	486,915
Accumulated other comprehensive income (loss)	(536)	54
Accumulated deficit	(126,530)	(55,361)
Total stockholders’ equity	502,916	431,609
Total liabilities and stockholders’ equity	539,139	442,319
Class A common stock
Stockholders’ equity:
Common stock	1	1
Class B common stock
Stockholders’ equity:
Common stock	$ 0	$ 0