Note 3 - Real Estate - Summary of Geographic Concentration of Properties (Details) $ in Thousands	3 Months Ended
Mar. 31, 2025 USD ($) Property	Mar. 31, 2024 USD ($)
Concentration Risk [Line Items]
Gross Real Estate Assets	$ 375,900
Geographic Concentration Risk [Member]
Concentration Risk [Line Items]
Number of Properties \| Property	15
Gross Real Estate Assets	$ 375,949
Percentage of Total Real Estate Assets	100.00%
Geographic Concentration Risk [Member] \| Rental Income [Member]
Concentration Risk [Line Items]
Revenues	$ 9,842	$ 9,511
Geographic Concentration Risk [Member] \| Maryland [Member]
Concentration Risk [Line Items]
Number of Properties \| Property	6
Gross Real Estate Assets	$ 102,898
Percentage of Total Real Estate Assets	27.40%
Geographic Concentration Risk [Member] \| Maryland [Member] \| Rental Income [Member]
Concentration Risk [Line Items]
Revenues	$ 3,617	3,074
Geographic Concentration Risk [Member] \| Virginia [Member]
Concentration Risk [Line Items]
Number of Properties \| Property	5
Gross Real Estate Assets	$ 199,655
Percentage of Total Real Estate Assets	53.10%
Geographic Concentration Risk [Member] \| Virginia [Member] \| Rental Income [Member]
Concentration Risk [Line Items]
Revenues	$ 3,979	3,965
Geographic Concentration Risk [Member] \| Washington, D.C. [Member]
Concentration Risk [Line Items]
Number of Properties \| Property	1
Gross Real Estate Assets	$ 8,380
Percentage of Total Real Estate Assets	2.20%
Geographic Concentration Risk [Member] \| Washington, D.C. [Member] \| Rental Income [Member]
Concentration Risk [Line Items]
Revenues	$ 131	183
Geographic Concentration Risk [Member] \| Colorado [Member]
Concentration Risk [Line Items]
Number of Properties \| Property	3
Gross Real Estate Assets	$ 65,016
Percentage of Total Real Estate Assets	17.30%
Geographic Concentration Risk [Member] \| Colorado [Member] \| Rental Income [Member]
Concentration Risk [Line Items]
Revenues	$ 2,115	$ 2,289

Percentage of real estate property investment.

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The number of real estate properties owned as of the balance sheet date.

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Amount of real estate investment property which may include the following: (1) land available-for-sale; (2) land available-for-development; (3) investments in building and building improvements; (4) tenant allowances; (5) developments in-process; (6) rental properties; and (7) other real estate investments.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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