Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Cash flow from operating activities:
Net loss	$ (2,518)	$ (23,186)
Adjustments to reconcile net loss to net cash used in operating activities:
Stock-based compensation expense	1,185	4,200
Depreciation and amortization expense	4	28
Accretion of discounts and amortization of premiums on investments, net	(225)	(759)
Changes in operating assets and liabilities:
Prepaid expenses and other current assets	331	(2,112)
Other long-term assets		2
Accounts payable	(155)	835
Accrued and other liabilities	(1,151)	(3,061)
Operating lease assets and liabilities, net	(54)	(12)
Other liabilities	202	392
Net cash used in operating activities	(2,381)	(23,673)
Cash flow from investing activities:
Purchases of short-term investments		(14,750)
Maturities of short-term investments	12,850	23,583
Net cash provided by investing activities	12,850	8,833
Cash flow from financing activities:
Payments for offering costs		(233)
Proceeds from issuance of common stock upon exercise of stock options		704
Net cash provided by financing activities		471
Net increase in cash and cash equivalents	10,469	(14,369)
Cash and cash equivalents at the beginning of the year	33,751	23,491
Cash and cash equivalents at the end of the period	44,220	9,122
Supplemental disclosure of noncash investing and financing activities:
Right-of-use asset obtained in exchange for operating lease liability		206
Deferred offering costs included in accounts payable		$ 82