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Balance Sheet Details (Accounts payable and accrued liabilities) (Details) - USD ($)
$ in Thousands
Jun. 30, 2025
Dec. 31, 2024
Balance Sheet Details    
Accounts payable $ 965 $ 766
Accrued clinical trial expenses   828
Other accrued expenses 575 461
Accounts Payable and Accrued Liabilities, Current, Total $ 1,540 $ 2,055