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Note 2 - Summary of Significant Accounting Policies (Details Textual) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Impairment, Long-Lived Asset, Held-for-Use $ 87 $ 0 $ 676 $ 0  
Tangible Asset Impairment Charges 3   33   $ (0)
Operating Lease, Impairment Loss $ 84   $ 643    
Equipment [Member] | Minimum [Member]          
Property, Plant and Equipment, Useful Life 5 years   5 years    
Equipment [Member] | Maximum [Member]          
Property, Plant and Equipment, Useful Life 7 years   7 years    
Computer Equipment and Software [Member] | Minimum [Member]          
Property, Plant and Equipment, Useful Life 3 years   3 years    
Computer Equipment and Software [Member] | Maximum [Member]          
Property, Plant and Equipment, Useful Life 5 years   5 years    
Furniture and Fixtures [Member] | Minimum [Member]          
Property, Plant and Equipment, Useful Life 5 years   5 years    
Furniture and Fixtures [Member] | Maximum [Member]          
Property, Plant and Equipment, Useful Life 7 years   7 years