Joint Venture (Details) - USD ($) $ in Thousands |
2 Months Ended | 9 Months Ended |
|---|---|---|
Oct. 31, 2014 |
May 31, 2015 |
|
| Joint Venture | ||
| Net gain attributable to non-controlling interest | $ 95 | |
| JV | Joint venture partner | ||
| Joint Venture | ||
| Purchases made | $ 332 | |
| NEPTCO | ||
| Joint Venture | ||
| Net gain attributable to non-controlling interest | $ 95 | |
| NEPTCO | Joint venture partner | ||
| Joint Venture | ||
| Ownership interest (as a percent) | 50.00% | |
| NEPTCO | Joint venture partner | Minimum | ||
| Joint Venture | ||
| Percentage of total glass fiber requirements agreed to be purchased | 80.00% | |
| NEPTCO | JV | Joint venture partner | ||
| Joint Venture | ||
| Membership interest purchased | 50.00% |