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Note 11 - Other Assets (Tables)
 12 Months Ended
Dec. 31, 2019
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
   

2019

    

2018

    

2017

  

Balance at January 1,

   $ 14,448     $ 21,838     $ 23,197  

Additions:

                        

New mortgage loans

     3,750       14,825       -  

Additions under existing mortgage loans

     48       -       -  

Foreign currency translation

     -       116       385  

Amortization of loan discounts

     33       125       112  

Deductions:

                        

Loan repayments

     (10,136 )     (21,012 )     -  

Charge off/foreign currency translation

     -       (155 )     (449 )

Collections of principal

     (313 )     (1,287 )     (1,405 )

Amortization of loan costs

     (1 )     (2 )     (2 )

Balance at December 31,

   $ 7,829     $ 14,448     $ 21,838