Revenue (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Revenue Recognized at a Point in Time [Member] | Underwriting Services [Member]
Revenue [Line Items]
Total revenue from contracts with customers	$ 79,000	$ 11,400
Revenue Recognized at a Point in Time [Member] | Carried Interest [Member]
Revenue [Line Items]
Total revenue from contracts with customers	22,700
Revenue Recognized at a Point in Time [Member] | Commissions [Member]
Revenue [Line Items]
Total revenue from contracts with customers	19,500	6,100
Revenue Recognized at a Point in Time [Member] | Principal Transactions Revenue [Member]
Revenue [Line Items]
Total revenue	(900)	2,200
Transferred over Time [Member] | Account Advisory Fees [Member]
Revenue [Line Items]
Total revenue from contracts with customers	246	308
Transferred over Time [Member] | Other revenue [Member]
Revenue [Line Items]
Total revenue from contracts with customers	590	309
Transferred over Time [Member] | Management Fees [Member]
Revenue [Line Items]
Total revenue from contracts with customers	606	103
Transferred over Time [Member] | Interest Income Customers [Member]
Revenue [Line Items]
Total revenue from contracts with customers	368	133
Transferred over Time [Member] | Interest Income – Noncustomer [Member]
Revenue [Line Items]
Total revenue from contracts with customers		$ 533
Transferred over Time [Member] | Interest Income – Noncustomer [Member]
Revenue [Line Items]
Total revenue	$ 904