Commitments and Contingencies - Additional Information (Detail) - USD ($) |
1 Months Ended | ||
|---|---|---|---|
Jun. 22, 2016 |
Feb. 28, 2013 |
Sep. 30, 2016 |
|
| Commitments And Contingencies Disclosure [Abstract] | |||
| Purchase commitment | $ 48,500,000 | ||
| Contractual agreement quarterly forecasts required period | 24 months | ||
| Contractual agreement obligated forecast period | 12 months | ||
| Defendants’ time to respond to electrical workers complaint | 30 days |