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Note 6 - Rental Income Under Operating Leases (Tables)
9 Months Ended
Sep. 30, 2023
Notes Tables  
Lessor, Operating Lease, Payment to be Received, Maturity [Table Text Block]

2023 (Remainder)

  $ 7,580  

2024

    30,457  

2025

    24,822  

2026

    4,548  

2027

    3,915  

Thereafter

    19,315  

Total

  $ 90,637