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
Jun. 30, 2023
Dec. 31, 2022
Short-Term Debt [Line Items]    
Total mortgages payable $ 32,079  
Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 19,336 $ 20,519
Less: Mortgages payable, current (700) (1,491)
Mortgages payable, less current portion 18,636 19,028
Bank of New England – New Bedford, MA and Middleboro, MA properties | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 11,943 12,141
Bank of New England – Wilmington, DE property | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 1,282 1,345
DuQuoin State Bank – Anna, IL and Harrisburg, IL properties | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 732 750
DuQuoin State Bank – Metropolis, IL property | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 2,439 2,508
DuQuoin State Bank - Mt. Vernon, IL property | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable 2,940 2,974
Less: Mortgages payable, current (70) (68)
South Porte Bank – Mt. Vernon, IL property | Mortgages    
Short-Term Debt [Line Items]    
Total mortgages payable $ 0 $ 801