Long-Lived Assets by Geographic Location (Detail) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Property and equipment, net	$ 2,827	$ 2,042
Operating lease ROU assets	3,405	4,629
Americas
Segment Reporting Information [Line Items]
Property and equipment, net	606	839
Operating lease ROU assets	2,100	4,265
Europe and the Middle East
Segment Reporting Information [Line Items]
Property and equipment, net	73	55
Operating lease ROU assets	224	105
Asia-Pacific
Segment Reporting Information [Line Items]
Property and equipment, net	2,148	1,148
Operating lease ROU assets	$ 1,081	$ 259