Commitments and Contingencies - Summary of Restructuring Activity (Detail) - USD ($) $ in Thousands		3 Months Ended
	Aug. 07, 2019	Mar. 31, 2020	Mar. 31, 2019
Restructuring Cost And Reserve [Line Items]
Beginning balance		$ 45
Restructuring expenses	$ 600	87	$ 0
Payments made		(48)
Payments received		24
Foreign currency adjustment		(1)
Ending balance		107
Severance [Member]
Restructuring Cost And Reserve [Line Items]
Beginning balance		12
Restructuring expenses		87
Payments made		(12)
Payments received		0
Foreign currency adjustment		(1)
Ending balance		86
Lease Termination [Member]
Restructuring Cost And Reserve [Line Items]
Beginning balance		33
Restructuring expenses		0
Payments made		(36)
Payments received		24
Foreign currency adjustment		0
Ending balance		$ 21