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Long-Lived Assets by Geographic Location (Detail) - USD ($)
$ in Thousands
Mar. 31, 2020
Dec. 31, 2019
Segment Reporting Information [Line Items]    
Property and equipment, net $ 1,956 $ 2,042
Operating lease ROU assets 4,102 4,629
Americas    
Segment Reporting Information [Line Items]    
Property and equipment, net 700 839
Operating lease ROU assets 3,868 4,265
Europe and the Middle East    
Segment Reporting Information [Line Items]    
Property and equipment, net 49 55
Operating lease ROU assets 102 105
Asia-Pacific    
Segment Reporting Information [Line Items]    
Property and equipment, net 1,207 1,148
Operating lease ROU assets $ 132 $ 259