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Stock-based Compensation, Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Stock-based Compensation Expense [Abstract] |  |  |  |
Stock-based compensation | $ 816 | $ 776 | $ 2,625 | $ 2,567
General and Administrative [Member] |  |  |  |
Stock-based Compensation Expense [Abstract] |  |  |  |
Stock-based compensation | 567 | 549 | 1,810 | 1,850
Research and Development [Member] |  |  |  |
Stock-based Compensation Expense [Abstract] |  |  |  |
Stock-based compensation | $ 249 | $ 227 | $ 815 | $ 717

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