Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Sep. 30, 2021	Jun. 30, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 269,925		$ 238,605
Prepaid expenses and other current assets	3,592		2,076
Total current assets	273,517		240,681
Property and equipment, net	3,908		4,102
Other assets	154		154
Total assets	277,579		244,937
Current liabilities:
Accounts payable and accrued expenses	24,939		12,068
Current portion of deferred rent	482		387
Current portion of deferred revenue	19,806		19,806
Total current liabilities	45,227		32,261
Long-term accrued interest	0		5
Deferred rent, less current portion	1,699		2,015
Other debt	0		682
Total liabilities	46,926		34,963
Commitments and contingencies (Note 5)
Stockholders’ equity:
Preferred stock, $0.0001 par value; 200,000,000 shares authorized at June 30, 2021 and December 31, 2020; 0 shares issued and outstanding at June 30, 2021 and December 31, 2020
Common stock value	4		3
Additional paid-in capital	393,578		300,888
Accumulated deficit	(162,929)		(90,917)
Total stockholders’ equity	230,653	178,023	209,974
Total liabilities and stockholders’ equity	277,579		244,937
Class B Common Stock
Stockholders’ equity:
Common stock value	0
Total stockholders’ equity	$ 0	$ 0	$ 0