Note 16 - Financial Information by Business Segment - Total Revenues and Income by Business Segment (Details) - USD ($)	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023
Revenue from Contract with Customer, Including Assessed Tax	$ 10,984,000	$ 15,074,000
Investment Income, Net	2,144,000	316,000
Other income (loss)	251,000	242,000
Income (loss) before income taxes	1,915,000	4,083,000
Depreciation, Depletion and Amortization, Nonproduction	196,000	243,000
Gross identifiable assets	50,130,000	53,753,000
Deferred tax asset	1,833,000	1,920,000
Consolidated total assets	51,963,000	55,673,000
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	10,984,000	15,074,000
Investment Income, Net	0	0
Other income (loss)	251,000	242,000
Income (loss) before income taxes	(130,000)	3,868,000
Depreciation, Depletion and Amortization, Nonproduction	196,000	243,000
Gross identifiable assets	27,494,000	25,918,000
Corporate Investments [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	0
Investment Income, Net	2,144,000	316,000
Other income (loss)	0	0
Income (loss) before income taxes	2,045,000	215,000
Depreciation, Depletion and Amortization, Nonproduction	0	0
Gross identifiable assets	$ 22,636,000	$ 27,835,000