Note 3 - Significant Accounting Policies (Details Textual) - USD ($)	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jul. 01, 2023
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 10,500,000	$ 12,500,000
Accounts Receivable, Allowance for Credit Loss	0	0
Impairment, Long-Lived Asset, Held-for-Use	$ 0	0
Investment Advisory Fees, Fee Adjustment Base Percentage Adjustment	0.25%
Investment Advisory Fees, Fee Adjustment Percent, Minimum Performance to Designed Benchmark Over Prior Rolling 12 Months	5.00%
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Noncurrent	$ 132,000	(0)
Retained Earnings (Accumulated Deficit)	$ 37,460,000	$ 37,572,000
Accounting Standards Update 2016-13 [Member]
Debt Securities, Held-to-Maturity, Allowance for Credit Loss, Noncurrent			$ 232,000
Accounting Standards Update 2016-13 [Member] | Cumulative Effect, Period of Adoption, Adjustment [Member]
Retained Earnings (Accumulated Deficit)			$ (183,000)
Furniture and Fixtures [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	3 years
Furniture and Fixtures [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	10 years
Building and Building Improvements [Member] | Minimum [Member]
Property, Plant and Equipment, Useful Life (Year)	14 years
Building and Building Improvements [Member] | Maximum [Member]
Property, Plant and Equipment, Useful Life (Year)	40 years