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Note 7 - Commitments and Contingencies (Tables)
6 Months Ended
Jun. 30, 2026
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   

Commercial

   

Residential

   

Total

 

Three months ended June 30, 2026

    16 %     84 %     100 %

Three months ended June 30, 2025

    26

%

    74

%

    100

%

Six months ended June 30, 2026

    16 %     84 %     100 %

Six months ended June 30, 2025

    26 %     74 %     100 %