Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Operating activities
Net loss	$ (16,109)	$ (53,196)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation	3,234	5,884
Depreciation expense	486	484
Non-cash lease expense	132	116
Amortization of premiums and accretion of discounts on available-for-sale securities, net	(192)	(431)
Loss on disposal of equipment		7
Changes in operating assets and liabilities:
Prepaid expenses and other current and long-term assets, net	1,164	1,141
Accounts payable and accrued liabilities	(10,179)	(1,961)
Operating lease liability	(200)	(178)
Net cash used in operating activities	(21,664)	(48,134)
Investing activities
Purchases of available-for-sale securities	(16,269)	(11,322)
Maturities of available-for-sale securities	9,359	50,958
Purchases of property and equipment		(33)
Net cash (used in) provided by investing activities	(6,910)	39,603
Financing activities
Proceeds from issuance of common stock under employee stock purchase plan	24	148
Net cash provided by financing activities	24	148
Net decrease in cash, cash equivalents and restricted cash	(28,550)	(8,383)
Cash, cash equivalents and restricted cash, beginning of period	49,069	91,215
Cash, cash equivalents and restricted cash, end of period	$ 20,519	$ 82,832