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Note 2 - Summary of Presentation (Tables)
12 Months Ended
Dec. 31, 2020
Mortgage Servicing Rights ("MSRs") [Member]  
Notes Tables  
Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]
    As at December 31,
    2020
     
Discount rate    
11.5
%
Conditional prepayment rate    
6.0
%