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Note 1 - Organization (Details Textual) $ in Thousands	1 Months Ended		3 Months Ended
	Apr. 30, 2022 USD ($)	Feb. 28, 2022 USD ($)	Mar. 31, 2022 USD ($) ft² a	Mar. 31, 2021 USD ($)	Dec. 31, 2019
Payments to Acquire Real Estate, Total | $			$ 13,885	$ 7,745
Percentage of Aggregate Cash Distributions From, and Profits and Losses			37.90%
Corporate Joint Venture [Member]
Joint Venture, Ownership Percentage					50.00%
Corporate Joint Venture [Member] | General and Administrative Expense [Member]
Joint Venture Expense | $			$ 20	$ 20
Land [Member]
Payments to Acquire Real Estate, Total | $	$ 4,300	$ 3,700
Tribeca House properties in Manhattan, Building One [Member]
Number of Stories			21
Tribeca House properties in Manhattan, Building Two [Member]
Number of Stories			12
Tribeca House properties in Manhattan [Member] | Multifamily [Member]
Gross Leasable Area (Square Foot)			483,000
Tribeca House properties in Manhattan [Member] | Rental Retail and Parking [Member]
Gross Leasable Area (Square Foot)			77,000
Flatbush Gardens in Brooklyn [Member] | Multifamily [Member]
Gross Leasable Area (Square Foot)			1,749,000
Number of Buildings			59
Number of Rentable Units			2,494
141 Livingston Street in Brooklyn [Member] | Office Building [Member]
Number of Stories			15
Gross Leasable Area (Square Foot)			216,000
250 Livingston Street in Brooklyn [Member] | Office and Residential Building [Member]
Number of Stories			12
Gross Leasable Area (Square Foot)			370,000
Aspen [Member]
Number of Stories			7
Aspen [Member] | Residential Rental [Member]
Gross Leasable Area (Square Foot)			166,000
Aspen [Member] | Retail Site [Member]
Gross Leasable Area (Square Foot)			21,000
Clover House [Member]
Number of Stories			11
Clover House [Member] | Apartment Building [Member]
Gross Leasable Area (Square Foot)			102,000
Property at 10 W 65th St. Manhattan, NY [Member] | Residential Rental [Member]
Number of Stories			6
Gross Leasable Area (Square Foot)			76,000
Residential Property in Brooklyn, NY [Member] | Residential Rental [Member]
Number of Stories			9
Property Located Brooklyn, New York [Member] | Residential Rental [Member]
Area of Real Estate Property (Square Foot)			119,000
Dean Street, Prospect Heights [Member] | Residential Rental [Member]
Number of Stories			9
Gross Leasable Area (Square Foot) | a			160,000
Dean Street, Prospect Heights [Member] | Retail Site [Member]
Gross Leasable Area (Square Foot) | a			9,000

X

- Definition

The amount of floor space available to be rented in a property.

+ References

No definition available.

+ Details

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- Definition

Joint venture expenses incurred during the period.

+ References

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+ Details

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X

- Definition

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+ References

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- Definition

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+ References

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- Definition

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+ References

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- Definition

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+ References

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+ Details

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X

- Definition

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+ References

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+ Details

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X

- Definition

Area of a real estate property.

+ References

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X

- Definition

The cash outflow from the acquisition of a piece of land, anything permanently fixed to it, including buildings, structures on it and so forth; includes real estate intended to generate income for the owner; excludes real estate acquired for use by the owner.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 13
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3213-108585

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