Condensed Consolidated Statements of Financial Condition (Current Period Unaudited) - USD ($) $ in Thousands	Jun. 30, 2025	Dec. 31, 2024
Cash and cash equivalents	$ 249,360	$ 299,551
Trading - U.S. Treasury Bills	143,140	68,299
Investments in equity securities (includes GAMCO stock with a fair value of $16,248 and $16,920, respectively)	194,736	199,040
Investments in affiliated registered investment companies	174,592	165,515
Investments in partnerships	144,611	139,988
Receivable from brokers	27,373	27,634
Investment advisory fees receivable	1,103	4,142
Income taxes receivable, including deferred tax assets, net	2,108	6,021
Goodwill	3,519	3,519
Other assets	17,462	20,944
Total assets	959,126	935,289
LIABILITIES, REDEEMABLE NONCONTROLLING INTERESTS AND EQUITY
Payable to brokers	6,886	5,491
Income taxes payable, including deferred tax liabilities, net	4,046	0
Compensation payable	18,213	17,747
Securities sold, not yet purchased	7,243	8,436
Accrued expenses and other liabilities	2,314	5,317
Total liabilities	38,702	36,991
Redeemable noncontrolling interests	5,770	5,592
Commitments and contingencies (Note 11)
Equity:
Preferred stock, $0.001 par value; 10,000,000 shares authorized; none issued and outstanding	0	0
Additional paid-in capital	999,047	999,047
Retained earnings	69,950	45,809
Treasury stock, at cost (4,467,940 and 4,407,681 shares, respectively)	(154,368)	(152,175)
Total equity	914,654	892,706
Total liabilities, redeemable noncontrolling interests and equity	959,126	935,289
Common Class A [Member]
Equity:
Common Stock	6	6
Common Class B [Member]
Equity:
Common Stock	19	19
Affiliated Entity [Member]
Receivable from affiliates	1,122	636
Investment, Affiliated Issuer [Member]
Investments in affiliated registered investment companies	$ 174,592	$ 165,515