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Note 2 - Acquisitions (Details Textual) - USD ($) $ / shares in Units, $ in Millions	Oct. 01, 2024	Feb. 03, 2025	Sep. 19, 2024	Jul. 01, 2024	Jun. 30, 2024
Share Price (in dollars per share)	$ 37.74
Tabula Investment Management [Member]
Subsidiary, Ownership Percentage, Noncontrolling Owner					1.20%
Victory Park Capital Advisors (V P C) [Member]
Business Acquisition, Percentage of Voting Interests Acquired	55.00%
Payments to Acquire Businesses, Gross	$ 114.0
Business Acquisition, Equity Interest Issued or Issuable, Number of Shares (in shares)	824,208
Business Combination, Contingent Consideration, Liability	$ 25.5
Business Combination, Contingent Consideration Arrangements, Range of Outcomes, Value, High	111.4
Business Acquisition, Goodwill, Expected Tax Deductible Amount	$ 130.0
Acquired Finite-Lived Intangible Assets, Weighted Average Useful Life (Year)	6 years
Victory Park Capital Advisors (V P C) [Member] \| Investment Management Contracts [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 28.0
Finite-Lived Intangible Asset, Useful Life (Year)	4 years
Victory Park Capital Advisors (V P C) [Member] \| Client Relationships [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 20.5
Victory Park Capital Advisors (V P C) [Member] \| Client Relationships [Member] \| Minimum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	4 years
Victory Park Capital Advisors (V P C) [Member] \| Client Relationships [Member] \| Maximum [Member]
Finite-Lived Intangible Asset, Useful Life (Year)	10 years
Victory Park Capital Advisors (V P C) [Member] \| Trademarks [Member]
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Finite-Lived Intangibles	$ 5.5
Finite-Lived Intangible Asset, Useful Life (Year)	9 years
Triumph Capital Markets Holdco, LP (T C M) [Member]
Business Acquisition, Percentage of Voting Interests Acquired		55.00%
Tabula Investment Management [Member]
Business Acquisition, Percentage of Voting Interests Acquired				98.80%
N B K Capital Partners [Member]
Business Acquisition, Percentage of Voting Interests Acquired			100.00%