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Note 7 - Mortgage Notes Payable - Scheduled Principal Payments of Mortgage Notes Payable (Details)
Mar. 31, 2021
USD ($)
2021 $ 11,346,851
2022 21,306,422
2023 6,188,936
2024 16,158,948
2025 28,874,478
Thereafter 25,694,340
Total 109,569,975
Office/Industrial and Retail Notes Payable [Member]  
2021 6,945,593
2022 9,780,330
2023 1,493,749
2024 10,448,812
2025 28,874,478
Thereafter 25,694,340
Total 83,237,302
Model Home Properies Notes Payable [Member]  
2021 4,401,258
2022 11,526,092
2023 4,695,187
2024 5,710,136
2025 0
Thereafter 0
Total $ 26,332,673