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Note 5 - Investment Securities (Tables)
6 Months Ended
Dec. 31, 2021
Notes Tables  
Debt Securities Available for Sale and Held to Maturity [Table Text Block]
           

Gross

   

Gross

         
   

Amortized

   

Unrealized

   

Unrealized

   

Fair

 
   

Cost

   

Gains

   

Losses

   

Value

 
   

(Dollars in Thousands)

 

December 31, 2021

                               

AVAILABLE FOR SALE

                               

U.S. government agency securities

  $ 3,204     $ -     $ (22 )   $ 3,182  

Corporate debt securities

    96,710       220       (154 )     96,776  

Foreign debt securities​​1

    37,065       92       (72 )     37,085  

Obligations of states and political subdivisions

    724       -       (13 )     711  

Total

  $ 137,703     $ 312     $ (261 )   $ 137,754  
           

Gross

   

Gross

         
   

Amortized

   

Unrealized

   

Unrealized

   

Fair

 
   

Cost

   

Gains

   

Losses

   

Value

 
   

(Dollars in Thousands)

 

December 31, 2021

                               

HELD TO MATURITY

                               

U.S. government agency securities

  $ 7,748     $ -     $ (50 )   $ 7,698  

Obligations of states and political subdivisions

    2,205       75       -       2,280  

Total

  $ 9,953     $ 75     $ (50 )   $ 9,978  
           

Gross

   

Gross

         
   

Amortized

   

Unrealized

   

Unrealized

   

Fair

 
   

Cost

   

Gains

   

Losses

   

Value

 
   

(Dollars in Thousands)

 

June 30, 2021

                               

AVAILABLE FOR SALE

                               

U.S. government agency securities

  $ 3,215     $ -     $ (1 )   $ 3,214  

Corporate debt securities

    109,501       546       (7 )     110,040  

Foreign debt securities​1

    37,440       179       (21 )     37,598  

Obligations of states and political subdivisions

    730       -       (5 )     725  

Total

  $ 150,886     $ 725     $ (34 )   $ 151,577  
           

Gross

   

Gross

         
   

Amortized

   

Unrealized

   

Unrealized

   

Fair

 
   

Cost

   

Gains

   

Losses

   

Value

 
   

(Dollars in Thousands)

 

June 30, 2021

                               

HELD TO MATURITY

                               

U.S. government agency securities

  $ 12,744     $ 5     $ -     $ 12,749  

Obligations of states and political subdivisions

    2,745       98       -       2,843  

Total

  $ 15,489     $ 103     $ -     $ 15,592  
Investments Classified by Contractual Maturity Date [Table Text Block]
   

Due in one year or less

   

Due after one through five years

   

Due after five through ten years

   

Due after ten years

   

Total

 
   

(Dollars in Thousands)

 

AVAILABLE FOR SALE

                                       

Amortized cost

  $ 55,191     $ 82,043     $ 469     $ -     $ 137,703  

Fair value

    55,239       82,054       461       -       137,754  

HELD TO MATURITY

                                       

Amortized cost

  $ 1,185     $ 1,020     $ 7,748     $ -     $ 9,953  

Fair value

    1,213       1,067       7,698       -       9,978