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Condensed Consolidated Statements of Cash Flows - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Operating activities:    
Net loss $ (34,443) $ (36,496)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation 3,835 2,671
Operating lease right-of-use assets 330 262
Depreciation and amortization 113 109
Accretion of available-for-sale marketable securities, net (1,076) (1,070)
Changes in operating assets and liabilities:    
Accounts payable (721) (194)
Accrued expenses and other liabilities (860) 3,276
Prepaid expenses and other current assets (1,636) 2,736
Net cash used in operating activities (34,458) (28,706)
Investing activities:    
Proceeds from maturities of available-for-sale marketable securities 52,779 55,643
Purchases of property, equipment and leasehold improvements (12) (28)
Purchases of available-for-sale marketable securities (116,266) (53,271)
Net cash (used in) provided by investing activities (63,499) 2,344
Financing activities:    
Proceeds from offering of common stock, net of commissions 108,154 0
Proceeds from exercises of warrants 10,757 0
Proceeds from exercises of stock options 1,854 381
Proceeds from disgorgement of beneficial owner's short-swing profits 725 0
Proceeds from Employee Stock Purchase Plan 59 34
Proceeds from at-the-market sales agreement, net of commissions and allocated fees 0 9,697
Payments of offering costs (809) 0
Payments of finance lease (11) (95)
Net cash provided by financing activities 120,729 10,017
Net increase (decrease) in cash and cash equivalents 22,772 (16,345)
Cash and cash equivalents at beginning of period 34,097 32,397
Cash and cash equivalents at end of period $ 56,869 $ 16,052