Note 4 - Investments (Details Textual) - USD ($)	3 Months Ended
Mar. 31, 2024	Mar. 31, 2023
Equity Method Investments	$ 3,668,000
Gain (Loss) on Investments	$ 239,000	$ 295,000
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member]
Equity Method Investment, Ownership Percentage	26.50%
Transfer Advisory Business to New Entity [Member]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	$ 2,800,000

Difference between amount at which an investment accounted for under the equity method of accounting is carried (reported) on the balance sheet and amount of underlying equity in net assets the reporting Entity has in the investee.

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

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Amount of realized and unrealized gain (loss) on investment.

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