Summary of significant accounting policies and estimates (Details) - USD ($) $ in Thousands		12 Months Ended
	Oct. 26, 2021	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		$ 1,108,206	$ 795,312
Carrying value of intangibles		35,709	34,340
Defined-lived intangible assets		$ 2,900
Number of business days for related transactions (in days)		1 day
Cash equivalents maximum maturity period of highly liquid investments		90 days
Period after April 29, 2023	10 days
Combination period	18 months
Net income (loss) attributable to non-controlling interests		$ (310)	93	$ (241)
IPO
Summary Of Significant Accounting Policies [Line Items]
Total funds	$ 127,800
Proceeds from Company sponsored Initial Public Offering	126,500
Investment from sponsor	$ 1,300
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 | 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		9 years
Securities
Summary Of Significant Accounting Policies [Line Items]
Number of business days for related transactions (in days)		1 day
Auction rate securities
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		$ 2,652	2,713
Level 3
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		2,652	2,713
Level 3 | Auction rate securities
Summary Of Significant Accounting Policies [Line Items]
Securities owned, at fair value		$ 2,652	$ 2,713