Represents the voting power on the investment.

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Amount of unrealized gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in net income (trading).

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 220
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The amount of unfunded commitments for which the entity is obligated, to those certain investments for which net asset value per share is calculated (including by unit, membership interest, or other equity (ownership interest) unit measure) (alternative investments).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition

Amount of investment in equity method investee and investment in and advance to affiliate.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

+ References

No definition available.

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- Definition

Number of new stock issued during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Subparagraph (SX 210.3-04)
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- Details

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Namespace Prefix:
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Period Type:

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Note 5 - Investments (Details Textual) - USD ($) $ in Thousands		12 Months Ended
	Apr. 21, 2025	Dec. 31, 2024	Jun. 30, 2025
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share, Unfunded Commitments			$ 0
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures		$ 10,073	10,311
ACMAT Corporation [Member]
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures			$ 12,500
Assignment and Contribution Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)	2,899,876
Assignment and Contribution Agreement [Member] \| ACMAT Corporation [Member]
Subsidiary, Ownership Percentage, Parent			39.10%
Minority Interest, Voting Power	10.40%		10.40%
ACMAT Common Stock [Member] \| Assignment and Contribution Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)	10,203
ACMAT Class A Stock [Member] \| Assignment and Contribution Agreement [Member]
Stock Issued During Period, Shares, New Issues (in shares)	291,656
Fixed Income Securities [Member]
Debt Securities, Unrealized Gain (Loss)		$ 0