Condensed Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2023	Dec. 31, 2022
Current assets:
Cash and cash equivalents	$ 251,964	$ 129,159
Short-term investments	288,205	167,087
Prepaid expenses and other current assets	4,817	3,791
Total current assets	544,986	300,037
Property and equipment, net	49,696	15,084
Restricted cash	339	339
Right-of-use assets	8,484	9,308
Other assets	8	8
Total assets	603,513	324,776
Current liabilities:
Accounts payable	2,237	2,623
Accrued liabilities	13,610	6,691
Current portion of operating lease liabilities	1,266	1,144
Total current liabilities	17,113	10,458
Unvested stock liability	2,620	929
Operating lease liabilities, net of current portion	8,458	9,425
Commitments and contingencies (Note 3)
Convertible preferred stock, $0.0001 par value; authorized shares – no shares and 179,639,650 at September 30, 2023 and December 31, 2022, respectively; issued and outstanding shares – no shares and 34,942,503 at September 30, 2023 and December 31, 2022, respectively; liquidation preference $0 and $397,755 at September 30, 2023 and December 31, 2022, respectively	0	415,258
Stockholders’ equity (deficit):
Preferred stock, $0.0001 par value, 10,000,000 shares authorized – no shares issued and outstanding	0	0
Common stock, $0.0001 par value; authorized shares – 700,000,000 and 246,500,000 at September 30, 2023 and December 31, 2022, respectively; issued shares – 61,047,189 and 5,515,050 at September 30, 2023 and December 31, 2022, respectively; outstanding shares – 59,826,184 and 4,532,751 at September 30, 2023 and December 31, 2022, respectively	6	1
Additional paid-in capital	755,829	19,374
Accumulated other comprehensive loss	(386)	(553)
Accumulated deficit	(180,127)	(130,116)
Total stockholders’ equity (deficit)	575,322	(111,294)
Total liabilities, convertible preferred stock and stockholders’ equity (deficit)	$ 603,513	$ 324,776
Preferred stock, par value (in dollars per share)	$ 0.0001	$ 0.0001
Preferred stock, shares authorized (in shares)	10,000,000	10,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0