Note 1 - The Company (Details Textual)		6 Months Ended
Note 1 - The Company (Details Textual)	Sep. 01, 2015 USD ($)	Jun. 30, 2025 USD ($) a	Jul. 30, 2025 USD ($) a	Jun. 30, 2025 ft²	Jun. 30, 2025	Mar. 20, 2023 ft²
Number of Real Estate Properties					2
The Corporation [Member]
Maximum Value of Asset to Effect Dissolution	$ 1,000,000	$ 1,000,000
Cortlandt Manor Medical Center [Member] \| Cortlandt, New York [Member]
Area of Real Estate Property \| ft²				31,000		154,000
Area of Land \| a		13.8
Cortlandt Manor Medical Center [Member] \| Cortlandt, New York [Member] \| Medical Use [Member]
Area of Real Estate Property \| ft²						150,000
Cortlandt Manor Medical Center [Member] \| Cortlandt, New York [Member] \| Retail Use [Member]
Area of Real Estate Property \| ft²						4,000
St. James Flowerfield Complex [Member] \| St. James, New York [Member] \| Subsequent Event [Member]
Area of Land \| a			49
Sale of Real Estate Property, Purchase Price			$ 28,740,000
St. James Flowerfield Complex [Member] \| St. James, New York [Member] \| Subsequent Event [Member] \| Minimum [Member]
Sale of Real Estate Property, Purchase Price			24,000,000
St. James Flowerfield Complex [Member] \| St. James, New York [Member] \| Subsequent Event [Member] \| Maximum [Member]
Sale of Real Estate Property, Purchase Price			$ 28,740,000
Flowerfield Properties, Inc. [Member] \| St. James, New York [Member] \| Controlled by Parent Company [Member]
Area of Real Estate Property \| a		63
Flowerfield Properties, Inc. [Member] \| St. James, New York [Member] \| Multi-Tenant Industrial Park [Member]
Area of Real Estate Property		14		135,000