Equity-Based Compensation - Narrative (Details)															3 Months Ended		9 Months Ended		12 Months Ended	16 Months Ended	28 Months Ended	33 Months Ended
	Jun. 23, 2025 $ / shares shares	May 22, 2025 $ / shares shares	May 14, 2025 $ / shares shares	Apr. 15, 2025 $ / shares shares	Feb. 27, 2025 $ / shares shares	Dec. 23, 2024 $ / shares shares	Aug. 02, 2024 $ / shares shares	Jun. 27, 2024 $ / shares shares	Jun. 05, 2024 $ / shares shares	Mar. 01, 2024 $ / shares shares	Feb. 06, 2024 $ / shares shares	Jul. 14, 2023 USD ($) d	May 31, 2023 $ / shares shares	Mar. 23, 2023 $ / shares shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) $ / shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2024 USD ($) $ / shares shares	Dec. 31, 2023 $ / shares shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2025 USD ($) $ / shares shares	Sep. 30, 2025 USD ($) $ / shares shares	Dec. 31, 2024 USD ($) $ / shares	Jan. 07, 2022 d
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Unrecognized equity-based compensation expense															$ 28,300,000		$ 28,300,000			$ 28,300,000	$ 28,300,000	$ 28,300,000
Unrecognized equity-based compensation expense, weighted average recognition period (in years)																	1 year 9 months 10 days
Share-based payment arrangement, expense															7,121,000	$ 7,905,000	$ 23,761,000	$ 19,247,000
Earn-in consideration payable															$ 0		$ 0			$ 0	$ 0	$ 0	$ 932,000
Holbein Partners, LLP (“Holbein”)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Earn-in expense, cash (in percent)																	50.00%
Earn-in expense, equity (in percent)																	50.00%
Earn-in share-purchase payment period | d																								10
Earn-in payment, first date												$ 7,100,000
Earn-in payment, second date												$ 8,900,000
Earn-in, share-purchase price, volume weighted average price, number of days | d												20
Earn-in consideration payable																							$ 900,000
RSUs
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares issued in period (in shares) | shares																	7,676,202	4,123,786
Fair value of shares issued (in dollars per share) | $ / shares															$ 4.22	$ 4.90	$ 4.22	$ 4.90	$ 4.64	$ 4.22	$ 4.22	$ 4.22	$ 4.86
Share-based payment arrangement, expense															$ 4,616,000	$ 3,076,000	$ 13,733,000	$ 8,168,000
Shares forfeited in period (in shares) | shares																	256,559	615,060
RSUs | Board of directors
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares issued in period (in shares) | shares	231,889						45,549	123,732		138,564				65,554
Vesting period (in shares)	12 months						11 months	12 months		4 months				9 months
Fair value of shares issued (in dollars per share) | $ / shares	$ 4.07						$ 4.38	$ 4.91		$ 5.87				$ 12.56
Share-based payment arrangement, expense															200,000	200,000	$ 700,000	$ 1,000,000
RSUs | Share-Based Payment Arrangement, Employee
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares issued in period (in shares) | shares			99,245		2,772,576				2,219,661				4,697,317
Vesting period (in shares)			3 years		3 years				3 years				3 years
Fair value of shares issued (in dollars per share) | $ / shares			$ 3.32		$ 3.45				$ 4.78				$ 4.35
Share-based payment arrangement, expense															$ 2,500,000	2,800,000	$ 9,000,000.0	6,100,000
Shares forfeited in period (in shares) | shares																					1,047,964
RSUs | Class A Common Stock
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Authorized (in shares) | shares															20,798,132		20,798,132			20,798,132	20,798,132	20,798,132
Available for grant (in shares) | shares															6,032,108		6,032,108			6,032,108	6,032,108	6,032,108
Buy-out equity awards as restricted stock units (RSUs), first grant date | Share-Based Payment Arrangement, Employee
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares issued in period (in shares) | shares																			111,148
Fair value of shares issued (in dollars per share) | $ / shares																			$ 7.66
Buy-out equity awards as restricted stock units (RSUs), second grant date | Share-Based Payment Arrangement, Employee
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares issued in period (in shares) | shares																			118,987
Fair value of shares issued (in dollars per share) | $ / shares																			$ 8.72
Buy-out equity awards as restricted stock units (RSUs) | Share-Based Payment Arrangement, Employee
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares issued in period (in shares) | shares				81,266		57,458					29,154
Vesting period (in shares)				3 years		3 years					2 years
Fair value of shares issued (in dollars per share) | $ / shares				$ 3.31		$ 4.14					$ 5.36
Share-based payment arrangement, expense															$ 100,000	100,000	$ 800,000	1,000,000
Shares forfeited in period (in shares) | shares																						39,662
Buy-out equity awards as restricted stock units (RSUs) | Share-Based Payment Arrangement, Employee | Minimum
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Vesting period (in shares)																			1 year
Buy-out equity awards as restricted stock units (RSUs) | Share-Based Payment Arrangement, Employee | Maximum
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Vesting period (in shares)																			3 years
Restricted Stock Units (RSUs), Retention Awards
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment arrangement, expense															1,800,000		$ 3,200,000
PRSUs
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares issued in period (in shares) | shares		263,564							1,567,125
Vesting period (in shares)																	3 years
Fair value of shares issued (in dollars per share) | $ / shares		$ 2.82							$ 5.76
Share-based payment arrangement, expense															665,000	1,715,000	$ 2,535,000	2,180,000
Ending average stock price (in dollars per share) | $ / shares		$ 3.19							$ 4.78
Volatility rate (in percent)		60.70%							62.10%
Risk free rate (in percent)		4.00%							4.50%
Expected term (in years)		2 years 10 months 9 days							2 years 10 months 17 days
PRSUs | Share-Based Payment Arrangement, Employee
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares forfeited in period (in shares) | shares																				289,942
Earn-in awards | Holbein Partners, LLP (“Holbein”)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares issued in period (in shares) | shares																	1,686,763
Share-based payment arrangement, expense															12,800	700,000	$ 900,000	3,200,000
Earn-in awards | East End Advisors, LLC ("EEA")
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Shares issued in period (in shares) | shares																	436,816
Equity Awards | East End Advisors, LLC ("EEA")
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment arrangement, expense															500,000	700,000	$ 1,700,000	1,000,000.0
Equity Awards | Envoi, LLC (“Envoi”)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment arrangement, expense															40,600	100,000	200,000	100,000
Earn In Awards | Pointwise Partners Limited ("PW")
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment arrangement, expense																400,000		600,000
Earn In Awards | Kontora Family Office GmbH ("Kontora")
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment arrangement, expense															400,000		1,800,000
Revenue share
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment arrangement, expense															285,000	435,000	492,000	799,000
Deferred compensation
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Share-based payment arrangement, expense															$ 1,343,000	$ 871,000	$ 2,432,000	$ 3,245,000