v3.26.1
Note 10 - Fair Values of Financial Instruments 2 (Details Textual) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Fair Value Measured at Net Asset Value Per Share [Member] | Location, Statement of Financial Position, Balance [Axis]: us-gaap:OtherAssets    
Investments, Fair Value Disclosure $ 3.5 $ 3.5