Capitalized Software Development Costs - Summary of Capitalized Software Development Costs Including Stock-Based Compensation and Amortization (Detail) - Internal Use Software [Member] - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Capitalized Computer Software [Line Items]
Software development costs capitalized	$ 5,433	$ 3,278
Stock-based compensation included in capitalized software development costs	838	508
Amortization of capitalized software development costs	$ 3,475	$ 2,495