Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2024	Dec. 31, 2023
Current assets:
Cash and cash equivalents	$ 32,292	$ 21,709
Marketable securities	52,534	92,585
Prepaid expenses and other current assets	1,210	923
Prepaid research and development	1,180	2,742
Total current assets	87,216	117,959
Property and equipment, net	10,036	15,295
Right of use assets - operating leases	14,037	16,858
Other assets	463	433
Total assets	111,752	150,545
Current liabilities:
Accounts payable	1,489	1,298
Accrued expenses and other current liabilities	6,729	11,670
Non-refundable sublicense payments received	5,000
Operating lease liabilities	3,733	3,373
Total current liabilities	16,951	16,341
Operating lease liabilities - noncurrent	22,085	22,921
Total liabilities	39,036	39,262
Commitments and contingencies (note 10)
Stockholders' equity:
Preferred stock, $0.0001 par value: 10,000,000 shares authorized; no shares issued and outstanding at both September 30, 2024 and December 31, 2023
Common stock, $0.0001 par value: 300,000,000 shares authorized; 61,767,286 shares issued and outstanding at September 30, 2024 and 54,944,130 shares issued and outstanding at December 31, 2023	6	5
Additional paidin capital	719,188	705,789
Accumulated other comprehensive income (loss)	32	(43)
Accumulated deficit	(646,510)	(594,468)
Total stockholders' equity	72,716	111,283
Total liabilities and stockholders' equity	$ 111,752	$ 150,545