Basis of Presentation and Summary of Significant Accounting Policies (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($) segment corporation entity company	Sep. 30, 2019 USD ($)
Disaggregation of Revenue [Line Items]
Advertising expenses | $	$ 3,400,000	$ 3,500,000	$ 8,900,000	$ 6,900,000
Number of reporting units (segment) | segment			1
Impairment charges | $	$ 0	$ 0	$ 0	$ 0
Number of limited liability companies treated as partnerships for tax purposes | company			2
Number of limited liability companies disregarded for tax purposes | company			10
Number of corporations | corporation			4
Number of foreign entities | entity			1
Award vesting period			4 years
Minimum
Disaggregation of Revenue [Line Items]
Subscription contract, term			1 year
Estimated useful life			3 years
Amortization period			1 year
Amortization period			2 years
Maximum
Disaggregation of Revenue [Line Items]
Subscription contract, term			3 years
Estimated useful life			10 years
Amortization period			3 years
Amortization period			15 years