CONDENSED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Cash flows from operating activities:
Net loss	$ (27,832)	$ (31,983)
Adjustments to reconcile net loss to net cash used in operating activities:
Share-based compensation expense	1,898	2,834
Depreciation and amortization	2,340	2,299
Accretion and amortization of premiums and (discounts) on investments, net	(753)	(1,565)
Non-cash lease expense	544	482
Changes in operating assets and liabilities:
Prepaid expenses and other assets	898	(509)
Operating lease liabilities	(1,420)	(1,362)
Accounts payable and accrued and other liabilities	(3,874)	192
Net cash used in operating activities	(28,199)	(29,612)
Cash flows from investing activities:
Purchases of property and equipment	(413)	(518)
Purchases of investments	(54,277)	(20,581)
Maturities of investments	70,605	75,436
Net cash provided by investing activities	15,915	54,337
Cash flows from financing activities:
Proceeds from stock option exercises	6
Net cash provided by financing activities	6
Net (decrease) increase in cash and cash equivalents	(12,278)	24,725
Cash, cash equivalents, and restricted cash beginning of period	42,377	30,616
Cash, cash equivalents, and restricted cash end of period	30,099	55,341
Reconciliation of cash, cash equivalents and restricted cash to the balance sheet:
Cash and cash equivalents	27,356	52,598
Restricted cash	2,743	2,743
Total cash, cash equivalents and restricted cash	30,099	55,341
Supplemental disclosures of non-cash investing and financing activities:
Acquisitions of property and equipment in accounts payable and accrued and other current liabilities	$ 14	$ 90