Significant Accounting Policies - Additional Information (Details)	3 Months Ended
	Mar. 31, 2022 USD ($) Segment		Mar. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)		Dec. 31, 2020 USD ($)
Revenue Recognition
Contract measurement period (in years)	3 years
Cash and Cash Equivalents
Cash	$ 35,576,000	[1]	$ 29,650,000	$ 81,133,000	[1]	$ 65,534,000
Restricted Cash	2,214,000		1,054,000	1,056,000		$ 1,050,000
Investments
Impairment losses recognized	0		0
Concentration of Credit Risk
Allowance for doubtful accounts receivable	$ 0			0
Leases
Lease term	12 months
Business Segments
Number of operating segments (in segments) | Segment	1
Income Taxes
Valuation allowance on deferred tax assets	$ 0			$ 0
Section 754 election tax deduction period	15 years
Cash savings generated by this election will be distributed to selling and converting shareholders upon realization (in hundredth)	85.00%
Percentage of cash tax savings in income tax if realizes company expects to benefit	15.00%
Percentage of estimated realizable tax benefit added to liability due under tax receivable agreement	85.00%
Cash savings generated by this election will increase additional paid-in capital	15.00%
Foreign Currency
Other comprehensive income (loss) associated with foreign currency translation adjustments	$ (134,000)		(12,000)
Minimum
Significant Accounting Policies [Line Items]
Equity method investment, ownership percentage	0.00%
Maximum
Significant Accounting Policies [Line Items]
Equity method investment, ownership percentage	4.00%
Foreign Currency
Other comprehensive income (loss) associated with foreign currency translation adjustments			$ 100,000
Equipment | Minimum
Property Plant and Equipment
Property and equipment, useful life (years)	3 years
Equipment | Maximum
Property Plant and Equipment
Property and equipment, useful life (years)	7 years
Internal-use Software Developments
Property Plant and Equipment
Property and equipment, useful life (years)	3 years

[1] Asset and liability amounts in parentheses represent the aggregated balances at March 31, 2022 and December 31, 2021 attributable to Pzena U.S. Best Ideas (GP), LLC and Pzena Global Best Ideas (GP), LLC, which were variable interest entities as of March 31, 2022 and December 31, 2021. Asset and liability amounts in parentheses at December 31, 2021 are also attributable to Pzena Global Focus Value Fund.