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Note 13 - Subsequent Events (Details Textual)
$ / shares in Units, $ in Millions
Apr. 28, 2025
USD ($)
$ / shares
shares
Apr. 25, 2025
Apr. 17, 2025
USD ($)
Apr. 09, 2025
USD ($)
Apr. 07, 2025
USD ($)
May 06, 2024
May 24, 2023
Debt Instrument, Variable Interest Rate, Type [Extensible Enumeration]   Three Year I Curve [Member]          
NYL Facility [Member]              
Debt Instrument, Interest Rate, Stated Percentage           4.60% 4.60%
Subsequent Event [Member] | Conversion of 2031 Notes Into Common Stock [Member]              
Debt Conversion, Original Debt, Amount $ 2.0            
Debt Conversion, Converted Instrument, Shares Issued (in shares) | shares 237,714            
Debt Instrument, Convertible, Threshold Consecutive Trading Days 5            
Debt Instrument, Convertible, Conversion Price (in dollars per share) | $ / shares $ 8.46            
Subsequent Event [Member] | NYL Facility [Member]              
Debt Instrument, Basis Spread on Variable Rate   2.95%          
Subsequent Event [Member] | NYL Facility [Member] | Minimum [Member]              
Debt Instrument, Interest Rate, Stated Percentage   4.60%          
Soli Organic, Inc [Member] | Subsequent Event [Member]              
Investment, Blockage Notice Period (Day) 180 days            
Debt Securities [Member] | Sparkcharge, Inc. [Member] | Subsequent Event [Member]              
Payments to Acquire Investments         $ 5.0    
Debt Securities [Member] | OneNetworks, Inc. dba Finexio [Member] | Subsequent Event [Member]              
Proceeds from Sale, Maturity and Collection of Investments       $ 5.0      
Debt Securities [Member] | Better Place Forests Co. [Member] | Subsequent Event [Member]              
Payments to Acquire Investments     $ 0.3        
Debt Securities [Member] | Swift Health Systems Inc. [Member] | Subsequent Event [Member]              
Payments to Acquire Investments     $ 0.1