Quarterly report pursuant to Section 13 or 15(d)

MORTGAGES AND NOTES PAYABLE - Schedule of mortgages (Details)

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MORTGAGES AND NOTES PAYABLE - Schedule of mortgages (Details) - USD ($)
$ in Thousands
Mar. 31, 2023
Dec. 31, 2022
Short-Term Debt [Line Items]    
Total mortgages payable $ 32,522  
Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 20,307 $ 20,519
Less: Mortgages payable, current (1,483) (1,491)
Mortgages payable, less current portion 18,824 19,028
Bank of New England – New Bedford, MA and Middleboro, MA properties | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 12,038 12,141
Bank of New England – Wilmington, DE property | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 1,313 1,345
DuQuoin State Bank – Anna, IL and Harrisburg, IL properties | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 741 750
DuQuoin State Bank – Metropolis, IL property | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 2,474 2,508
Du Quoin State Bank - Mt. Vernon, IL property | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 2,957 2,974
Less: Mortgages payable, current   (68)
South Porte Bank – Mt. Vernon, IL property | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable $ 784 $ 801