Maximum borrowing capacity under the debt agreement.

No definition available.

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- Definition

The period in which the payments on the loan are interest-only.

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Represents the period of time before the maturity date, during which period the entity has the option to prepay all (but not less than all) of the unpaid balance of the debt instrument without a prepayment premium.

+ References

No definition available.

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- Definition

Represents the debt instrument extension option period.

+ References

No definition available.

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

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.

+ References

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Period Type:	instant

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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- Definition

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

+ References

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- Definition

Amount of the required periodic payments including both interest and principal payments.

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- Definition

The percentage points added to the reference rate to compute the variable rate on the interest rate derivative.

+ References

No definition available.

+ Details

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- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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- Definition

The cash inflow from a debt initially having maturity due after one year or beyond the operating cycle, if longer.

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Namespace Prefix:	us-gaap_
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Period Type:	duration

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Note 7 - Notes Payable (Details Textual) - USD ($) $ in Thousands					12 Months Ended				60 Months Ended	132 Months Ended
	Dec. 31, 2019	Dec. 24, 2019	May 31, 2019	Feb. 21, 2018	Dec. 24, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Nov. 01, 2027	Jul. 31, 2028	Jun. 30, 2028	Nov. 08, 2019	Oct. 27, 2017	Jun. 27, 2016	May 11, 2016
Long-term Debt, Gross	$ 1,009,431					$ 1,009,431	$ 925,613
Gain (Loss) on Extinguishment of Debt, Total						(2,432)	$ (8,872)
Metlife Real Estate Lending LLC [Member] \| Clover House Loans [Member]
Long-term Debt, Gross												$ 82,000
Debt Instrument, Interest Rate, Effective Percentage												3.53%
Secured First Mortgage Loan [Member] \| New York Community Bank [Member]
Long-term Debt, Gross				$ 246,000
Debt Instrument, Interest Rate, Stated Percentage				3.50%
Debt Instrument, Interest Only Payments Period				30 years
Secured First Mortgage Loan [Member] \| New York Community Bank [Member] \| Prime Rate [Member]
Derivative, Basis Spread on Variable Rate				2.75%
First Mortgage Loan With Interest-only Payments [Member] \| Citi Real Estate Funding Inc. [Member]
Debt Instrument, Interest Rate, Stated Percentage			3.63%
Proceeds from Issuance of Long-term Debt, Total			$ 125,000
Debt Instrument, Prepayment Option, Number of Months Before Maturity			90 days
Mortgages 2 [Member] \| New York Community Bank [Member] \| 141 Livingston Street, Brooklyn [Member]
Long-term Debt, Gross															$ 79,500
Debt Instrument, Interest Rate, Stated Percentage															3.875%
Mortgages 2 [Member] \| New York Community Bank [Member] \| 141 Livingston Street, Brooklyn [Member] \| Forecast [Member]
Debt Instrument, Periodic Payment, Total											$ 374
Fixed Interest Rate Financing [Member]
Long-term Debt, Gross				$ 360,000
Debt Instrument, Interest Rate, Stated Percentage				4.506%
Mortgages [Member] \| New York Community Bank [Member] \| Property at 10 W 65th St. Manhattan, NY [Member]
Long-term Debt, Gross													$ 34,350
Debt Instrument, Interest Rate, Stated Percentage													3.375%
Mortgages [Member] \| New York Community Bank [Member] \| Prime Rate [Member] \| Property at 10 W 65th St. Manhattan, NY [Member] \| Forecast [Member]
Debt Instrument, Periodic Payment, Total									$ 152
Debt Instrument, Basis Spread on Variable Rate									2.75%
Mortgages [Member] \| Capital One Multifamily Finance LLC [Member] \| Aspen [Member]
Long-term Debt, Gross														$ 70,000
Debt Instrument, Interest Rate, Stated Percentage														3.68%
Mortgages [Member] \| Capital One Multifamily Finance LLC [Member] \| Aspen [Member] \| Forecast [Member]
Debt Instrument, Periodic Payment, Total										$ 321
Mortgages [Member] \| Citibank NA [Member] \| Residential Property At 1010 Pacific Street [Member]
Long-term Debt, Gross		$ 18,600
DebtInstrumentExtensionOptionPeriod					1 year
Mortgages [Member] \| Citibank NA [Member] \| London Interbank Offered Rate (LIBOR) [Member] \| Residential Property At 1010 Pacific Street [Member]
Debt Instrument, Basis Spread on Variable Rate	5.40%	3.60%
Construction Loans [Member] \| Citibank NA [Member] \| Residential Property At 1010 Pacific Street [Member]
Proceeds from Issuance of Long-term Debt, Total						$ 857
Debt Agreement Maximum Borrowing Capacity		$ 2,987