Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 221,199	$ 238,605
Prepaid expenses and other current assets	3,383	2,076
Total current assets	224,582	240,681
Property and equipment, net	4,351	4,102
Other assets	154	154
Total assets	229,087	244,937
Current liabilities:
Accounts payable and accrued expenses	10,331	12,068
Current portion of deferred rent	393	387
Current portion of deferred revenue	19,806	19,806
Total current liabilities	30,530	32,261
Long-term accrued interest	6	5
Deferred rent, less current portion	1,953	2,015
Other debt	682	682
Total liabilities	33,171	34,963
Commitments and contingencies (Note 5)
Stockholders’ equity:
Preferred stock, $0.0001 par value; 200,000,000 shares authorized at March 31, 2021 and December 31, 2020 and 2019; 0 shares issued and outstanding at March 31, 2021 and December 31, 2020
Common stock value	3	3
Additional paid-in capital	305,531	300,888
Accumulated deficit	(109,618)	(90,917)
Total stockholders’ equity	195,916	209,974
Total liabilities and stockholders’ equity	229,087	244,937
Class B Units
Stockholders’ equity:
Common stock value	0
Total stockholders’ equity	$ 0	$ 0