Deferred Revenues - Summary of Deferred Revenues (Detail) - USD ($) $ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
|---|---|---|
| Deferred Revenue Disclosure [Abstract] | ||
| Service activation fees | $ 10,800 | $ 3,411 |
| Prepaid services | 2,624 | 2,509 |
| Prepaid product revenues | 15 | |
| Extended warranty revenues | 252 | 169 |
| Total deferred revenue | 13,676 | 6,104 |
| Less current portion | (7,652) | (3,525) |
| Long-term portion | $ 6,024 | $ 2,579 |