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Note 8 - Commitments and Contingencies (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Schedules of Concentration of Risk, by Risk Factor [Table Text Block]
   

Commercial

   

Residential

   

Total

 

Three months ended September 30, 2023

    27

%

    73

%

    100

%

Three months ended September 30, 2022

    30

%

    70

%

    100

%

Nine months ended September 30, 2023

    28

%

    72

%

    100

%

Nine months ended September 30, 2022

    31

%

    69

%

    100

%