Inventories - Components of Inventories (Detail) - USD ($) $ in Thousands |
May 31, 2016 |
Feb. 29, 2016 |
|---|---|---|
| Inventory Disclosure [Abstract] | ||
| Raw material | $ 16,149 | $ 15,983 |
| Work-in-process | 3,094 | 3,099 |
| Finished goods | 8,345 | 8,537 |
| Inventories | $ 27,588 | $ 27,619 |