Note 15 - Financial Information by Business Segment - Total Revenues and Income by Business Segment (Details) - USD ($)	12 Months Ended
	Jun. 30, 2026	Jun. 30, 2025
Revenue from Contract with Customer, Including Assessed Tax	$ 10,251,000	$ 8,452,000
Investment Income, Net	4,148,000	2,393,000
Revenues	14,399,000	10,845,000
Other operating expenses	10,806,000	11,376,000
Segment profit (loss)	3,593,000	(531,000)
Other income (loss)	339,000	331,000
Depreciation	(42,000)	(61,000)
Interest	(6,000)	(1,000)
Income (loss) before income taxes	3,884,000	(262,000)
Gross identifiable assets	46,573,000	46,796,000
Deferred tax asset	1,461,000	1,268,000
Consolidated total assets	48,034,000	48,064,000
Investment Management Services [Member]
Revenue from Contract with Customer, Including Assessed Tax	10,251,000	8,452,000
Investment Income, Net	0	0
Revenues	10,251,000	8,452,000
Other operating expenses	10,806,000	11,376,000
Segment profit (loss)	(555,000)	(2,924,000)
Gross identifiable assets	24,726,000	26,134,000
Corporate Investments [Member]
Revenue from Contract with Customer, Including Assessed Tax	0	0
Investment Income, Net	4,148,000	2,393,000
Revenues	4,148,000	2,393,000
Other operating expenses	0	0
Segment profit (loss)	4,148,000	2,393,000
Gross identifiable assets	$ 21,847,000	$ 20,662,000