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Note 2 - Summary of Significant Accounting Policies - Property and Equipment (Details) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Gross property and equipment $ 685 $ 972
Less: accumulated depreciation and amortization (364) (473)
Net property and equipment 321 499
Equipment [Member]    
Gross property and equipment 277 334
Leasehold Improvements [Member]    
Gross property and equipment 141 298
Furniture and Fixtures [Member]    
Gross property and equipment 189 205
Property, Plant and Equipment, Other Types [Member]    
Gross property and equipment $ 78 $ 135