| Operating results by segment |
Operating results by segment for the three months ended April 30, 2016 and 2015 were as follows:
| | | | | | | | | | | | Three Months Ended April 30, | (in thousands) | | 2016 | | 2015 | Revenue: | | |
| | |
| Enterprise Intelligence | | |
| | |
| Segment revenue | | $ | 155,497 |
| | $ | 147,399 |
| Revenue adjustments | | (3,489 | ) | | (681 | ) | | | 152,008 |
| | 146,718 |
| Cyber Intelligence | | |
| | |
| Segment revenue | | 67,193 |
| | 91,590 |
| Revenue adjustments | | (65 | ) | | (140 | ) | | | 67,128 |
| | 91,450 |
| Video Intelligence | | |
| | |
| Segment revenue | | 26,288 |
| | 31,368 |
| Revenue adjustments | | — |
| | — |
| | | 26,288 |
| | 31,368 |
| Total revenue | | $ | 245,424 |
| | $ | 269,536 |
| | | | | | Segment contribution: | | |
| | |
| Enterprise Intelligence | | $ | 52,321 |
| | $ | 50,859 |
| Cyber Intelligence | | 11,078 |
| | 30,307 |
| Video Intelligence | | 7,283 |
| | 10,195 |
| Total segment contribution | | 70,682 |
| | 91,361 |
| | | | | | Unallocated expenses, net: | | |
| | |
| Amortization of acquired intangible assets | | 20,446 |
| | 18,717 |
| Stock-based compensation | | 15,340 |
| | 14,850 |
| Other unallocated expenses | | 46,187 |
| | 48,184 |
| Total unallocated expenses, net | | 81,973 |
| | 81,751 |
| Operating (loss) income | | (11,291 | ) | | 9,610 |
| Other expense, net | | (4,572 | ) | | (7,932 | ) | (Loss) income before provision for income taxes | | $ | (15,863 | ) | | $ | 1,678 |
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