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Note 11 - Stockholders' Equity (Deficit) (Details Textual)
$ in Thousands
 3 Months Ended
Feb. 20, 2026
shares
Mar. 31, 2026
USD ($)
shares
Mar. 12, 2026
shares
Mar. 11, 2026
shares
Dec. 31, 2025
shares
Common Stock, Shares Authorized (in shares)   5,000,000,000 5,000,000,000 1,500,000,000 5,000,000,000
Preferred Stock, Shares Authorized (in shares)   5,000,000     5,000,000
Stockholders' Equity Note, Stock Split, Conversion Ratio   5      
Stock Issued During Period, Shares, Reverse Stock Splits (in shares) 45,912        
Series B Preferred Stock [Member]          
Stock Issued During Period, Shares, New Issues (in shares)   0     0
Series B Preferred Stock [Member] | The 2021 Private Placement Program [Member]          
Stock Issued During Period, Shares, New Issues (in shares)   131     131
Series B Preferred Stock, Post-split [Member] | The 2021 Private Placement Program [Member]          
Preferred Stock, Convertible, Shares Issuable (in shares)   3,013      
Series F Preferred Stock [Member]          
Stock Issued During Period, Shares, New Issues (in shares)   0      
Stock Redeemed or Called During Period, Shares   1,346,633      
Stock Redeemed or Called During Period, Value | $   $ 350      
Reverse Stock Split [Member]          
Stockholders' Equity Note, Stock Split, Conversion Ratio 5 5