NOTES PAYABLE - Mortgage Loans Payable, Net (Details) - USD ($) $ in Thousands	Mar. 31, 2026	Dec. 31, 2025
Debt Instrument [Line Items]
Long-term debt	$ 236,908
Mortgage loans payable, net	172,197	$ 188,292
Mortgage Loans Payable
Debt Instrument [Line Items]
Long-term debt	172,658	188,800
Deduct: Deferred financing costs, less accumulated amortization	(461)	(508)
Mortgage loans payable, net	172,197	188,292
Mortgage Loans Payable \| State Farm Life Insurance Company \| Elston Plaza
Debt Instrument [Line Items]
Long-term debt	$ 0	16,107
Interest Rate	3.89%
Mortgage Loans Payable \| Massachusetts Mutual Life Insurance Company \| The Glenn
Debt Instrument [Line Items]
Long-term debt	$ 66,000	66,000
Interest Rate	3.02%
Mortgage Loans Payable \| Transamerica Life Insurance Company \| Wallingford Plaza
Debt Instrument [Line Items]
Long-term debt	$ 6,318	6,353
Interest Rate	4.56%
Mortgage Loans Payable \| Nationwide Life Insurance Company \| Providence Square
Debt Instrument [Line Items]
Long-term debt	$ 29,700	29,700
Interest Rate	3.67%
Mortgage Loans Payable \| Nationwide Life Insurance Company \| The Flats at Carrs Hill
Debt Instrument [Line Items]
Long-term debt	$ 25,500	25,500
Interest Rate	5.51%
Mortgage Loans Payable \| JPMorgan Chase Bank \| Seattle East Industrial
Debt Instrument [Line Items]
Long-term debt	$ 45,140	$ 45,140
Interest Rate	3.87%

Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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