Summary of significant accounting policies and estimates (Details) - USD ($)		12 Months Ended
	Oct. 26, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		$ 795,312,000	$ 498,594,000
Indefinite intangible assets		32,700,000
Defined-lived intangible assets		$ 1,600,000
Cash equivalents maximum maturity period of highly liquid investments		90 days
Proceeds from Company sponsored Initial Public Offering		$ 0	0	$ 126,500,000
Period after April 29, 2023	10 days
Combination period	18 months
Net income (loss) attributable to non-controlling interests		93,000	(241,000)	0
Restricted cash		0	25,534,000	$ 127,765,000
Auction rate securities
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		$ 2,713,000	31,776,000
IPO
Summary Of Significant Accounting Policies [Line Items]
Proceeds from Company sponsored Initial Public Offering	$ 126,500,000
Total funds	127,800,000
Investment from sponsor	$ 1,300,000
Minimum
Summary Of Significant Accounting Policies [Line Items]
Number of business days for related transactions (in days)		1 day
Minimum | Furniture, fixtures and equipment
Summary Of Significant Accounting Policies [Line Items]
Furniture, fixtures, and equipment, useful life		3 years
Minimum | Notes Receivable
Summary Of Significant Accounting Policies [Line Items]
Service period		3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Number of business days for related transactions (in days)		2 days
Maximum | Furniture, fixtures and equipment
Summary Of Significant Accounting Policies [Line Items]
Furniture, fixtures, and equipment, useful life		7 years
Maximum | Notes Receivable
Summary Of Significant Accounting Policies [Line Items]
Service period		10 years
Securities
Summary Of Significant Accounting Policies [Line Items]
Number of business days for related transactions (in days)		2 days
Commodities
Summary Of Significant Accounting Policies [Line Items]
Number of business days for related transactions (in days)		1 day
Level 3
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		$ 2,713,000	31,776,000
Level 3 | Auction rate securities
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		$ 2,713,000	$ 31,776,000