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Going Concern (Details) - USD ($)
$ in Thousands
6 Months Ended 12 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Going Concern [Line Items]          
Recurring operating losses $ 2,400 $ 32,700      
Net cash flow used in operating activities (1,025) $ (21,354) $ 33,577 $ (138,046) $ (178,012)
Accumulated deficit (739,285)   (737,049) (564,514)  
Cash and cash equivalents $ 147   $ 148 $ 23,188