Long-Lived Assets by Geographic Location (Detail) - USD ($) $ in Thousands	Jun. 30, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Property and equipment, net	$ 4,101	$ 2,827
Operating lease ROU assets	2,683	3,405
Americas
Segment Reporting Information [Line Items]
Property and equipment, net	610	606
Operating lease ROU assets	1,670	2,100
Europe and the Middle East
Segment Reporting Information [Line Items]
Property and equipment, net	348	73
Operating lease ROU assets	167	224
Asia-Pacific
Segment Reporting Information [Line Items]
Property and equipment, net	3,143	2,148
Operating lease ROU assets	$ 846	$ 1,081