Stockholders' Equity - Stock Repurchase Plan - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018	Feb. 01, 2019	Feb. 29, 2016
2019 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Additional authorized shares (in shares)	2,200,000.0		6,000,000.0
2016 Stock Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Outstanding common stock repurchase program authorized amount (up to)				$ 50,000,000.0
Shares repurchased during period (in shares)	0	0
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 16,300,000