Note 3 - Investments (Details Textual) - USD ($)		3 Months Ended			12 Months Ended
	Dec. 30, 2016	Jun. 30, 2021	Mar. 31, 2020	Jun. 30, 2018	Dec. 31, 2021	Dec. 31, 2020	Jun. 30, 2019
Equity Method Investments			$ 0		$ 3,615,000
Ownership Percentage					28.00%
Gain (Loss) on Investments, Total					$ 172,000	$ 400,000
Equity Securities without Readily Determinable Fair Value, Impairment Loss, Annual Amount			$ 750,000	$ 250,000
Payments to Acquire Investments, Total					1,800,000
Long-term Investments, Total					6,355,000	1,921,000
Long-term Investments [Member]
Equity Method Investments					1,822,000
Other Current Liabilities [Member]
Deposit Liability, Current					706,000	$ 3,335,000
Privately-Held Identity and Professional Services Company With Ties to the FinTech Industry [Member]
Equity Method Investment, Ownership Percentage							40.00%
Investments, Unfunded Commitments	$ 1,000,000
Transfer Advisory Business to New Entity [Member]
Financing Receivable, after Allowance for Credit Loss, Total					2,806,000
Cash, Ending Balance					$ 800,000
Ownership Percentage					28.00%
Privately Held Company Providing Supply Chain and Receivables Financing [Member]
Payments to Acquire Investments, Total		$ 1,000,000
Long-term Investments, Total		$ 1,000,000