Acquisitions and Business Combinations - Additional Information (Details) $ in Thousands	1 Months Ended	3 Months Ended	9 Months Ended
	Apr. 30, 2026 shares	Sep. 30, 2026 USD ($) payment	Sep. 30, 2026 USD ($) payment	Dec. 31, 2025 USD ($)	Dec. 31, 2024 USD ($)
Business Combination [Line Items]
Goodwill		$ 35,468	$ 35,468	$ 30,078	$ 30,078
Tax And Law Firm, Consulting Firm And An Accounting Firm
Business Combination [Line Items]
Total purchase price			25,037
Cash paid including the settlement of debt			9,225
Settlement of pre-existing arrangements			679
Fair value of earnout liability			1,309
Fair value of deferred consideration			13,824
Goodwill		5,390	5,390
Customer relationships		8,618	8,618
Bargain purchase gain		$ 1,420	$ 1,420
Vesting percentage			100.00%
Number of payments | payment		5	5
Period for each payment			12 months
Revenue		$ 10,700	$ 16,200
Tax And Law Firm, Consulting Firm And An Accounting Firm | After Closing
Business Combination [Line Items]
Stock-based compensation expense		6,900	$ 6,900
Service-based payment period			16 months
Tax And Law Firm, Consulting Firm And An Accounting Firm | Class A Common Stock
Business Combination [Line Items]
Stock-based compensation expense		$ 5,400	$ 5,400
Weighted-average period cost not yet recognized			3 years
Tax And Law Firm, Consulting Firm And An Accounting Firm | Customer relationships
Business Combination [Line Items]
Estimated useful life			10 years
April Transaction | Class A Common Stock
Business Combination [Line Items]
Consideration transferred, share issued (in shares) | shares	822,214
Canada Transaction | Class A Common Stock
Business Combination [Line Items]
Consideration transferred, share issued (in shares) | shares	108,517
Switzerland Acquisition | Class A Common Stock
Business Combination [Line Items]
Consideration transferred, share issued (in shares) | shares	32,554
2026 Acquisitions | Class A Common Stock
Business Combination [Line Items]
Consideration transferred, share issued (in shares) | shares	963,285
Vesting percentage			20.00%
Weighted-average period cost not yet recognized			4 years 7 months 6 days