Note 4 - Investments (Details Textual) - USD ($)	1 Months Ended	3 Months Ended			6 Months Ended
	Apr. 30, 2025	Jun. 30, 2025	Dec. 31, 2024	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Privately Held Company Providing Supply Chain and Receivables Financing [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner		12.50%			12.50%
Privatelyheld Technology Company and Program Manager With Ties To The Fintech Industry [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner		3.40%			3.40%
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member]
Equity Method Investment, Ownership Percentage		20.20%	20.20%		20.20%
Equity Method Investments		$ 2,842,000			$ 2,842,000
Gain (Loss) on Investments		165,000		$ 199,000	681,000	$ 438,000
Proceeds From Investors	$ 8,500,000
Payments to Acquire Equity Method Investments			$ 300,000
Equity Method Investment, Other-than-Temporary Impairment		0
Transfer Advisory Business to New Entity [Member]
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity		1,600,000			1,600,000
Privately Held Company Providing Supply Chain and Receivables Financing [Member]
Equity Securities without Readily Determinable Fair Value, Amount		182,000			182,000
Privatelyheld Technology Company and Program Manager With Ties To The Fintech Industry [Member]
Equity Securities without Readily Determinable Fair Value, Amount		$ 155,000			$ 155,000