Note 15 - Financial Information by Business Segment - Total Revenues and Income by Business Segment (Details) - USD ($)	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024
Revenue from Contract with Customer, Including Assessed Tax	$ 8,452,000	$ 10,984,000
Investment Income, Net	2,393,000	2,144,000
Other income (loss)	331,000	251,000
Income (loss) before income taxes	(262,000)	1,915,000
Operating income (loss)	(2,986,000)	(480,000)
Depreciation, Depletion and Amortization, Nonproduction	61,000	196,000
Add back: Interest	1,000	3,000
Operating income (loss), as adjusted	(2,924,000)	(281,000)
Gross identifiable assets	46,796,000	50,130,000
Deferred tax asset	1,268,000	1,833,000
Consolidated total assets	48,064,000	51,963,000
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	8,452,000	10,984,000
Investment Income, Net	0	0
Other income (loss)	331,000	251,000
Income (loss) before income taxes	(2,655,000)	(229,000)
Operating income (loss)	(2,986,000)	(480,000)
Depreciation, Depletion and Amortization, Nonproduction	61,000	196,000
Add back: Interest	1,000	3,000
Operating income (loss), as adjusted	(2,924,000)	(281,000)
Gross identifiable assets	26,134,000	27,494,000
Corporate Investments [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	0
Investment Income, Net	2,393,000	2,144,000
Other income (loss)	0	0
Income (loss) before income taxes	2,393,000	2,144,000
Operating income (loss)	0	0
Depreciation, Depletion and Amortization, Nonproduction	0	0
Add back: Interest	0	0
Operating income (loss), as adjusted	0	0
Gross identifiable assets	$ 20,662,000	$ 22,636,000