Business Combinations - Business acquisition, pro forma information (Detail) - Logentries [Member] - USD ($) $ in Thousands |
12 Months Ended | |
|---|---|---|
Dec. 31, 2015 |
Dec. 31, 2014 |
|
| Business Acquisition Pro Forma Information [Line Items] | ||
| Total revenue | $ 112,870 | $ 77,891 |
| Net loss | $ (61,192) | $ (49,813) |