Note 4 - Investments (Details Textual) - USD ($)	3 Months Ended		6 Months Ended	9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Jun. 30, 2021	Sep. 30, 2024	Sep. 30, 2023
Equity Method Investments	$ 3,378,000			$ 3,378,000
Gain (Loss) on Investments	90,000	$ 15,000		528,000	$ 701,000
Gain (Loss) on Investments	$ (90,000)	(15,000)		(528,000)	(701,000)
Payments to Acquire Investments				$ 98,000
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member]
Equity Method Investment, Ownership Percentage	26.50%			26.50%
Transfer Advisory Business to New Entity [Member]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	$ 2,800,000			$ 2,800,000
Privately Held Company Providing Supply Chain and Receivables Financing [Member]
Equity Method Investments		$ 0			0
Payments to Acquire Investments			$ 1,000,000
Asset Impairment Charges					$ 1,000,000