Property and Equipment (Schedule of Composition of the Company's Property and Equipment) (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Property and equipment, net	$ 30,973	$ 31,693
United States
Segment Reporting Information [Line Items]
Property and equipment, net	30,041	30,556
Latin America
Segment Reporting Information [Line Items]
Property and equipment, net	341	251
Europe
Segment Reporting Information [Line Items]
Property and equipment, net	333	841
Other
Segment Reporting Information [Line Items]
Property and equipment, net	$ 258	$ 45