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Statements of Cash Flows - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Operating activities    
Net loss $ (45,431) $ (41,441)
Adjustments to reconcile net loss to net cash used in operating activities:    
Depreciation 404 398
Stock-based compensation expense 4,760 4,509
Accretion of discounts on short-term investments, net (598) (921)
Changes in operating assets and liabilities:    
Accounts receivable and unbilled receivable (484) 483
Prepaid expenses and other current assets (452) 3,169
Operating lease right-of-use assets 539 543
Other assets 1,210 108
Accounts payable and accrued liabilities 2,985 2,831
Operating lease liabilities (626) (566)
Net cash used in operating activities (37,693) (30,887)
Investing activities:    
Capital expenditures (80) (582)
Maturities of short-term investments 27,106 86,552
Purchases of short-term investments (23,563) (70,084)
Sales of short-term investments 10,265 20,309
Net cash provided by investing activities 13,728 36,195
Financing activities:    
Proceeds from sales of common stock, net of expenses of $3,104 and $0, respectively 53,407  
Proceeds from exercise of options 373  
Net cash provided by financing activities 53,780  
Net change in cash and cash equivalents 29,815 5,308
Cash and cash equivalents—Beginning of period 21,655 16,347
Cash and cash equivalents—End of period $ 51,470 $ 21,655