Fair Value Measurements - Summary of Significant Unobservable Inputs Used in the Valuation of Company's Liabilities (Details) - Discounted Cash Flow [Member] $ in Thousands	Dec. 31, 2021 USD ($) Rate	Dec. 31, 2020 Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Present value factor | Rate	0.82%
Customer retention rate | Rate	84.00%	80.00%
Average present value factor	0.98	0.82%
Average customer retention rate | Rate	84.00%	80.00%
Average first earn out period variable fee | $	$ 2,895
Average percentage of electronic trading volume	0.913
Maximum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Present value factor	0.01
First earn out period variable fee | $	$ 3,086
Percentage of electronic trading volume	96.60%
Minimum [Member]
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Present value factor	0.95
First earn out period variable fee | $	$ 2,703
Percentage of electronic trading volume	86.00%