AdvisorEngine - Financial Interests - Summary of Ranges and Weighted Averages of Significant Unobservable Inputs Used to Determine Enterprise Value (Details)	Mar. 31, 2020
Measurement Input Forecasted Revenue as a Percentage of the Pre-Defined Revenue Targets [Member] | Maximum [Member]
Forecasted revenue as a percentage of pre-defined revenue target to measure contingent payments	0.71
Measurement Input Forecasted Revenue as a Percentage of the Pre-Defined Revenue Targets [Member] | Minimum [Member]
Forecasted revenue as a percentage of pre-defined revenue target to measure contingent payments	0.34
Measurement Input Forecasted Revenue as a Percentage of the Pre-Defined Revenue Targets [Member] | Weighted Average [Member]
Forecasted revenue as a percentage of pre-defined revenue target to measure contingent payments	0.47
Measurement Input Revenue Volatility [Member]
Revenue Volatility used to measure contingent payment	0.25