Deferred Engineering Costs - Additional Information (Detail) - USD ($) $ in Thousands |
Dec. 31, 2017 |
Dec. 31, 2016 |
|---|---|---|
| Deferred Costs [Line Items] | ||
| Deferred engineering costs | $ 18,000 | $ 0 |
| Accounts payable | ||
| Deferred Costs [Line Items] | ||
| Deferred engineering costs | $ 9,000 |
| X | ||||||||||
- Definition [Line Items] for Deferred Costs [Table] No definition available.
|
| X | ||||||||||
- Definition Sum of the carrying amounts of deferred costs that are expected to be recognized as a charge against earnings in periods after one year or beyond the normal operating cycle, if longer. Reference 1: http://www.xbrl.org/2003/role/presentationRef
|
| X | ||||||||||
- Details
|