Fair Value Measurements (Details) - USD ($)	Jun. 30, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Equity Investments, at Fair Value	$ 46,785,000	$ 90,219,000
Trading Securities, at Fair Value	20,642,000	0
Total Assets	67,437,000	90,227,000
Securities Sold Short, at Fair Value	241,000	237,000
Total Liabilities	241,000	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	46,785,000	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	19,635,000	0
Corporate Bonds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities, at Fair Value	1,007,000	0
Fair Value | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	46,469,000	89,490,000
Securities Sold Short, at Fair Value	241,000	237,000
Total Liabilities	241,000	237,000
Fair Value | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total Assets	20,968,000	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	46,459,000	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	326,000	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	19,635,000
Fair Value | Corporate Bonds | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Trading Securities, at Fair Value	$ 1,007,000