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Note 4 - Subordinated Notes Receivable (Tables)
12 Months Ended
Dec. 31, 2022
Notes Tables  
Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block]
  

Principal

  

Discount

  

Balance

 

Balance at January 1, 2021

 $3,271  $(1,388) $1,883 

Principal payments

  (190)  -   (190)

Impairment

  -   (701)  (701)

Balance at December 31, 2021

 $3,081  $(2,089) $992 

Impairment

  -   (992)  (992)

Balance at December 31, 2022

 $3,081  $(3,081) $-