Condensed Consolidated Balance Sheets (Unaudited) - USD ($) $ in Thousands	Mar. 31, 2022	Dec. 31, 2021
Current assets:
Cash and cash equivalents	$ 140,838	$ 161,405
Prepaid expenses and other current assets	4,911	4,249
Total current assets	145,749	165,654
Property and equipment, net	10,689	11,765
Right-of-use assets	5,125	5,491
Prepaid rent	1,444
Restricted cash	5,031	5,031
Long-term deposit	166	166
Total assets	168,204	188,107
Current liabilities:
Accounts payable	2,886	1,765
Accrued expenses and other current liabilities	3,012	6,517
Operating lease liability, current portion	1,698	1,651
Deferred revenue, current portion	10,869	11,410
Total current liabilities	18,465	21,343
Deferred revenue, net of current portion	0	1,497
Operating lease liability, net of current portion	3,948	4,392
Other long term liabilities	97	97
Total liabilities	22,510	27,329
Commitments and contingencies (Note 5)
Stockholders' equity (deficit):
Additional paid-in capital	254,005	252,933
Accumulated deficit	(108,314)	(92,158)
Total stockholders' deficit	145,694	160,778
Total liabilities and stockholders' equity	168,204	188,107
Voting Common Stock
Stockholders' equity (deficit):
Common stock	2	2
Non-voting Common Stock
Stockholders' equity (deficit):
Common stock	$ 1	$ 1