Consolidated Balance Sheets - USD ($)	Dec. 31, 2021	Dec. 31, 2020
Current assets:
Cash and cash equivalents	$ 161,405,000	$ 34,791,000
Prepaid expenses and other current assets	4,249,000	1,654,000
Total current assets	165,654,000	36,445,000
Property and equipment, net	11,765,000	5,659,000
Right-of-use assets	5,491,000	6,873,000
Restricted cash	5,031,000	595,000
Long-term deposit	166,000	166,000
Total assets	188,107,000	49,738,000
Current liabilities:
Accounts payable	1,765,000	2,910,000
Accrued expenses and other current liabilities	6,517,000	2,494,000
Operating lease liability, current portion	1,651,000	1,415,000
Deferred revenue, current portion	11,410,000	10,627,000
Total current liabilities	21,343,000	17,446,000
Deferred revenue, net of current portion	1,497,000	8,816,000
Operating lease liability, net of current portion	4,392,000	6,019,000
Other long term liabilities	97,000	238,000
Total liabilities	27,329,000	32,519,000
Commitments and contingencies (Note 10)
Convertible preferred stock (Note 6)		59,681,000
Stockholders' equity (deficit):
Additional paid-in capital	252,933,000	1,070,000
Accumulated deficit	(92,158,000)	(43,533,000)
Total stockholders' equity (deficit)	160,778,000	(42,462,000)
Total liabilities, convertible preferred stock and stockholders' equity (deficit)	188,107,000	49,738,000
Voting Common Stock
Stockholders' equity (deficit):
Common stock	2,000	$ 1,000
Non-voting Common Stock
Stockholders' equity (deficit):
Common stock	$ 1,000