Note 16 - Financial Information by Business Segment - Total Revenues and Income by Business Segment (Details) - USD ($)	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021
Revenue from Contract with Customer, Including Assessed Tax	$ 24,714,000	$ 21,654,000
Investment Income, Net, Total	(6,174,000)	28,338,000
Income (Loss) from Equity Method Investments	(206,000)	347,000
Other income	235,000	144,000
Income (loss) before income taxes	4,968,000	37,438,000
Depreciation, Depletion and Amortization, Nonproduction, Total	226,000	196,000
Gross identifiable assets	57,490,000
Deferred tax asset	872,000	0
Consolidated total assets	58,362,000	62,277,000
Gain (Loss) on Extinguishment of Debt, Total	0	444,000
Other Assets [Member]
Deferred tax asset	872,000
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	24,714,000	21,654,000
Investment Income, Net, Total	0	0
Income (Loss) from Equity Method Investments	0	0
Other income	235,000	144,000
Income (loss) before income taxes	11,622,000	10,866,000
Depreciation, Depletion and Amortization, Nonproduction, Total	226,000	196,000
Gross identifiable assets	23,003,000
Consolidated total assets		17,522,000
Gain (Loss) on Extinguishment of Debt, Total		444,000
Investment Management Services [Member] | Other Assets [Member]
Deferred tax asset
Corporate Investments [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	0
Investment Income, Net, Total	(6,174,000)	28,338,000
Income (Loss) from Equity Method Investments	(206,000)	347,000
Other income	0	0
Income (loss) before income taxes	(6,654,000)	26,572,000
Depreciation, Depletion and Amortization, Nonproduction, Total	0	0
Gross identifiable assets	34,487,000
Consolidated total assets		44,755,000
Gain (Loss) on Extinguishment of Debt, Total		$ 0
Corporate Investments [Member] | Other Assets [Member]
Deferred tax asset