Annual report pursuant to Section 13 and 15(d)

Segment and Geographic Information - Segment Geographic Information on Revenues and Long-Lived Assets by Geographic (Detail)

v3.8.0.1
Segment and Geographic Information - Segment Geographic Information on Revenues and Long-Lived Assets by Geographic (Detail) - USD ($)
$ in Thousands
3 Months Ended 12 Months Ended
Mar. 31, 2018
Dec. 31, 2017
Sep. 30, 2017
Jun. 30, 2017
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2018
Mar. 31, 2017
Mar. 31, 2016
Entity Wide Revenue Major Customer [Line Items]                      
Net revenues $ 20,961 $ 22,732 $ 15,905 $ 15,153 $ 11,599 $ 11,774 $ 9,874 $ 6,960 $ 74,751 $ 40,207 $ 22,251
Property and equipment, net 2,757       2,006       2,757 2,006 1,470
United States and Canada                      
Entity Wide Revenue Major Customer [Line Items]                      
Net revenues                 40,743 25,952 9,215
Property and equipment, net 2,701       1,916       2,701 1,916 1,376
Europe, Middle East, and Africa                      
Entity Wide Revenue Major Customer [Line Items]                      
Net revenues                 5,691 3,494 12,488
Property and equipment, net 41       73       41 73 94
Asia Pacific and China                      
Entity Wide Revenue Major Customer [Line Items]                      
Net revenues                 23,608 9,269 503
Property and equipment, net 15       17       15 17 0
Mexico, Central America, and South America                      
Entity Wide Revenue Major Customer [Line Items]                      
Net revenues                 4,709 1,492 45
Property and equipment, net $ 0       $ 0       $ 0 $ 0 $ 0