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Note 3 - Statements of Net Assets - Development of Cortlandt Manor Property (Details) - ft² | Dec. 31, 2020 | Dec. 31, 2019
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Medical Office Lot 2 [Member] |  |
Building size/yield (Square Foot) | 84,600 |
Medical Office Lot 1 [Member] |  |
Building size/yield (Square Foot) | 100,000 |
Retail [Member] |  |
Building size/yield (Square Foot) | 1,500 | 4,000

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- Definition Area of a real estate property. + References No definition available. + Details
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Balance Type: | na
Period Type: | instant

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- Details
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Balance Type: |
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- Details
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- Details
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