Fair Value Measurements - Schedule of Assets of Consolidated Funds Measured at Fair Value on Recurring Basis (Details) - USD ($)	Dec. 31, 2023	Jun. 30, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets	$ 39,312,000	$ 32,611,000
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	16,252,000	14,296,000
Debt securities	4,287,000
Total assets	20,539,000	14,296,000
Fair Value, Inputs, Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	0	0
Debt securities	0
Total assets	0	0
Fair Value, Inputs, Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	0	0
Debt securities	0
Total assets	0	0
Fair Value, Inputs, Level 1, 2 and 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	16,252,000	14,296,000
Debt securities	4,287,000
Total assets	20,539,000	14,296,000
Consolidated Funds | Fair Value, Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total assets		$ 0
Consolidated Funds | Fair Value, Inputs, Level 1 | Fair Value, Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	0
Debt securities	0
Total assets	0
Consolidated Funds | Fair Value, Inputs, Level 2 | Fair Value, Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	0
Debt securities	2,673,000
Total assets	2,673,000
Consolidated Funds | Fair Value, Inputs, Level 3 | Fair Value, Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	92,000
Debt securities	1,915,000
Total assets	2,007,000
Consolidated Funds | Fair Value, Inputs, Level 1, 2 and 3 | Fair Value, Recurring Basis
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity investments	92,000
Debt securities	4,588,000
Total assets	$ 4,680,000