Long-Lived Assets by Geographic Location (Detail) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014
Segment Reporting Information [Line Items]
Property and equipment, net	$ 4,218	$ 5,311
Americas - United States
Segment Reporting Information [Line Items]
Property and equipment, net	2,096	2,134
Americas
Segment Reporting Information [Line Items]
Property and equipment, net	2,096	2,134
Europe and the Middle East - Germany
Segment Reporting Information [Line Items]
Property and equipment, net	295	1,252
Europe And Middle East
Segment Reporting Information [Line Items]
Property and equipment, net	295	1,252
Asia-Pacific, Singapore
Segment Reporting Information [Line Items]
Property and equipment, net	1,807	1,867
Asia-Pacific, Other
Segment Reporting Information [Line Items]
Property and equipment, net	20	58
Asia-Pacific
Segment Reporting Information [Line Items]
Property and equipment, net	$ 1,827	$ 1,925