Revenues - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Revenue From Contract With Customer [Abstract]
Deferred revenue recognized in the period	$ 2.7	$ 3.1
Revenue remaining performance obligation expected timing of satisfaction explanation	The Company expects to recognize the majority of its deferred revenue as of March 31, 2020 over the next 180 days.
Estimated refund liabilities timing of resolution explanation	Estimated refund liabilities are generally resolved within 180 days, once it is determined whether the requisite service levels and client requirements were achieved to settle the contingency.