Fair Value Measurements (Details) - USD ($)	Sep. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Investments, at Fair Value	$ 23,687,000	$ 90,219,000
Trading Securities, at Fair Value	24,219,000	0
Total Assets	47,916,000	90,227,000
Securities Sold Short, at Fair Value	231,000	237,000
Total Liabilities	231,000	237,000
Money Market Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents	10,000	8,000
Equity Securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Investments, at Fair Value	23,687,000	82,900,000
Mutual Funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Investments, at Fair Value	0	7,319,000
Leveraged Loans
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities, at Fair Value	21,268,000	0
Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities, at Fair Value	2,951,000	0
Fair Value | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	23,321,000	89,490,000
Securities Sold Short, at Fair Value	231,000	237,000
Total Liabilities	231,000	237,000
Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	24,595,000	737,000
Fair Value | Money Market Funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash Equivalents	10,000	8,000
Fair Value | Equity Securities | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Investments, at Fair Value	23,311,000	82,163,000
Fair Value | Equity Securities | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Investments, at Fair Value	376,000	737,000
Fair Value | Mutual Funds | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Investments, at Fair Value		$ 7,319,000
Fair Value | Leveraged Loans | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities, at Fair Value	21,268,000
Fair Value | Corporate Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities, at Fair Value	$ 2,951,000