Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 370,675	$ 333,585
Investments	147,098	98,278
Accounts receivable, net	896	0
Related party receivables	439	99
Other receivables	340	163
Inventory	2,670	551
Prepaid expenses and other current assets	3,208	452
Total current assets	525,326	433,128
Property and equipment, net	10,776	8,441
Restricted cash	524	343
Other assets	423	407
Total assets	537,049	442,319
Current liabilities:
Accounts payable	1,602	2,115
Accrued expenses	5,590	5,147
Accrued research and development	490	396
Deferred revenue	445	250
Deferred rent, current	228	186
Total current liabilities	8,355	8,094
Deferred rent, net of current portion	2,248	1,899
Other noncurrent liabilities	402	717
Total liabilities	11,005	10,710
Commitments (Note 8)
Stockholders’ equity:
Preferred stock, $0.00001 par value; 5,000,000 shares authorized as of June 30, 2021 and December 31, 2020; zero shares issued and outstanding as of June 30, 2021 and December 31, 2020	0	0
Additional paid-in capital	614,483	486,915
Accumulated other comprehensive income (loss)	(34)	54
Accumulated deficit	(88,406)	(55,361)
Total stockholders’ equity	526,044	431,609
Total liabilities and stockholders’ equity	537,049	442,319
Class A common stock
Stockholders’ equity:
Common stock	1	1
Class B common stock
Stockholders’ equity:
Common stock	$ 0	$ 0