Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 244,979	$ 238,605
Prepaid expenses and other current assets	2,313	2,076
Total current assets	247,292	240,681
Property and equipment, net	3,676	4,102
Operating lease right-of-use-asset, net	3,300	0
Other assets	154	154
Total assets	254,422	244,937
Current liabilities:
Accounts payable and accrued expenses	18,424	12,068
Current portion of deferred rent	0	387
Current portion of deferred revenue	0	19,806
Operating lease liabilities	1,389	0
Total current liabilities	19,813	32,261
Long-term accrued interest	0	5
Deferred rent, less current portion	0	2,015
Operating lease liabilities, less current portion	3,982	0
Liability to licensor	19,806	0
Other debt	0	682
Total liabilities	43,601	34,963
Commitments and contingencies (Note 6)
Stockholders' equity:
Preferred stock, $0.0001 par value; 200,000,000 shares authorized at December 31,2021 and 2020; 0 shares issued and outstanding at December 31, 2021 and 2020	0	0
Additional paid-in capital	397,136	300,888
Accumulated deficit	(186,319)	(90,917)
Total stockholders' equity	210,821	209,974
Total liabilities and stockholders' equity	254,422	244,937
Common Class B
Stockholders' equity:
Common stock value	0	0
Common Stock
Stockholders' equity:
Common stock value	$ 4	$ 3