Note 3 - Significant Accounting Policies (Details Textual) - USD ($) $ in Thousands	12 Months Ended
Jun. 30, 2022	Jun. 30, 2021
Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount	$ 12,800	$ 7,300
Equity Method Investment, Other than Temporary Impairment	0	0
Accounts Receivable, Allowance for Credit Loss, Ending Balance	0	0
Impairment, Long-Lived Asset, Held-for-Use, Total	0	$ 0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued, Total	$ 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%
Domestic Tax Authority [Member]
Open Tax Year	2018 2019 2020 2021
Foreign Tax Authority [Member]
Open Tax Year	2015 2016 2017 2018 2019 2020 2021
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

Base percentage adjustment when fund performance is not within limits to benchmark index.

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Percent minimum performance to designed benchmark over prior rolling 12 months.

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- Definition

Amount of allowance for credit loss on accounts receivable.

+ References

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This item represents an other than temporary decline in value that has been recognized against an investment accounted for under the equity method of accounting. The excess of the carrying amount over the fair value of the investment represents the amount of the write down which is or was reflected in earnings. The written down value is a new cost basis with the adjusted value of the investment becoming its new carrying value subject to the equity accounting method. Evidence of a loss in value might include, but would not necessarily be limited to, absence of an ability to recover the carrying amount of the investment or inability of the investee to sustain an earnings capacity which would justify the carrying amount of the investment.

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The aggregate amount of write-downs for impairments recognized during the period for long lived assets held for use (including those held for disposal by means other than sale).

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- Definition

Tax year that remains open to examination under enacted tax laws, in YYYY format.

+ References

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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- Definition

The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE).

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