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Note 7 - Mortgage Notes Payable (Details Textual)					1 Months Ended
	Sep. 06, 2025 USD ($)	Aug. 06, 2025 USD ($)	Jun. 20, 2024 USD ($)	May 05, 2023 USD ($) ft²	Jul. 31, 2025 USD ($)	Sep. 30, 2025	Dec. 31, 2024 USD ($)
Mortgage Loan on West Fargo Industrial Properties [Member]
Debt Instrument, Face Amount			$ 5,750,000
Debt Instrument, Term (Year)			5 years
Debt Instrument, Interest Rate, Stated Percentage			7.14%
Mortgage Loan on Genesis Plaza Property [Member]
Debt Instrument, Face Amount		$ 6,250,000
Debt Instrument, Term (Year)		4 years
Debt Instrument, Interest Rate, Stated Percentage		7.07%
Mortgage Loan on One Park Center [Member]
Debt Instrument, Face Amount	$ 6,100,000
Debt Instrument, Term (Year)	5 years
Debt Instrument, Interest Rate, Stated Percentage	6.83%
Refinanced Loan [Member]
Debt Instrument, Face Amount				$ 3,800,000
Debt Instrument, Term (Year)				10 years
Debt Instrument, Interest Rate, Stated Percentage				6.35%
Construction Loan [Member]
Debt Instrument, Face Amount				$ 2,700,000
Debt Instrument, Term (Year)				10 years
Debt Instrument, Interest Rate, Stated Percentage				6.35%
Loans Payable							$ 2,700,000
Dakota Center [Member]
Real Estate, Purchase Offer Price					$ 5,125,000
Grand Pacific Center [Member]
Area of Real Estate Property (Square Foot) | ft²				33,296
Model Home [Member]
Number of Real Estate Properties Held for Sale						5
Model Home [Member] | Mortgage Notes [Member]
Debt Instrument, Covenant, Minimum Fixed Charge Coverage Ratio						1.1
Model Home [Member] | Mortgage Notes [Member] | Minimum [Member]
Debt Instrument, Interest Rate, Stated Percentage						5.94%
Model Home [Member] | Mortgage Notes [Member] | Maximum [Member]
Debt Instrument, Interest Rate, Stated Percentage						8.00%

X

- Definition

Minimum fixed charge coverage ratio under the covenant of the debt instrument.

+ References

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X

- Definition

Represents the number of real estate properties held for sale.

+ References

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- Definition

The purchase offer price for real estate.

+ References

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X

- Definition

Area of a real estate property.

+ References

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X

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

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X

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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X

- Definition

Including the current and noncurrent portions, aggregate carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer).

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