CONDENSED CONSOLIDATED BALANCE SHEETS (Unaudited) - USD ($)	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 278,132,000	$ 288,877,000
Prepaid expenses and other current assets	2,233,000	3,958,000
Total current assets	280,365,000	292,835,000
Restricted cash	441,000	441,000
Property and equipment, net	193,000	35,000
Right of use asset	4,097,000	4,327,000
Other assets, noncurrent	726,000	1,037,000
Total assets	285,822,000	298,675,000
Current liabilities:
Accounts payable	1,343,000	2,087,000
Accrued expenses and other current liabilities	2,187,000	3,181,000
Operating lease liability, current	693,000	385,000
Total current liabilities	4,223,000	5,653,000
Operating lease liability, noncurrent	3,591,000	3,954,000
Total liabilities	7,814,000	9,607,000
Commitments and contingencies (Note 12)
Stockholders' equity:
Common stock, $0.0001 par value, 500,000,000 shares authorized at December 31, 2022 and June 30, 2023; 39,377,222 and 39,628,764 shares issued and outstanding at December 31, 2022 and June 30, 2023, respectively	4,000	4,000
Additional paid-in capital	378,045,000	372,460,000
Accumulated deficit	(100,041,000)	(83,396,000)
Total stockholders' equity	278,008,000	289,068,000
Total liabilities and stockholders 'equity	$ 285,822,000	$ 298,675,000