Restructuring Costs - Summary of Activity and Estimated Timing of Future Payouts for Accrued Restructuring Costs (Detail) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)
Restructuring Reserve [Roll Forward]
Restructuring costs	$ 2,343
Non-cash asset impairment charge	(375)
Cash payments	(1,507)
Ending Balance	461
Estimated timing of future payments:
Expected to be paid in 2020	$ 461