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Condensed Statements of Cash Flows - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Cash flows from operating activities    
Net loss $ (15,758) $ (15,430)
Adjustments to reconcile net loss to net cash used in operating activities:    
Stock-based compensation 1,797 1,328
Depreciation and amortization 317 263
Accretion of investments, net (816) (972)
Non-cash lease expense 857 618
Changes in operating assets and liabilities:    
Prepaid expenses and other assets 214 (701)
Accounts payable and accrued liabilities (2,083) (210)
Operating lease liabilities 942 (672)
Net cash used in operating activities (14,530) (15,776)
Cash flows from investing activities    
Purchases of investments (52,625) (21,025)
Maturities of investments 55,744 39,245
Purchases of property and equipment (59) (83)
Net cash provided by investing activities 3,060 18,137
Cash flows from financing activities    
Payments of common stock offering costs   (983)
Proceeds from the exercise of stock options   59
Net cash used in financing activities   (924)
Net increase/ (decrease) in cash, cash equivalents, and restricted cash (11,470) 1,437
Cash, cash equivalents, and restricted cash at beginning of period 27,147 24,266
Cash, cash equivalents, and restricted cash at end of period 15,677 25,703
Components of cash, cash equivalents and restricted cash    
Cash and cash equivalents 15,117 25,143
Restricted Cash 560 560
Cash, cash equivalents and restricted cash at end of year 15,677 25,703
Non-cash investing and financing activities    
Change in unpaid common stock issuance costs   2,144
Vesting of early exercised stock options   2
Unpaid property and equipment purchases $ 22 $ 24