Revenues - Additional Information (Details) |
9 Months Ended |
|---|---|
Sep. 30, 2018 | |
| Disaggregation of Revenue [Line Items] | |
| Contract period (or less) | 1 year |
| Activation fee revenue recognition period | 1 month |
| Minimum | |
| Disaggregation of Revenue [Line Items] | |
| Data trial contract period | 3 years |
| Maximum | |
| Disaggregation of Revenue [Line Items] | |
| Percent of deferred revenue related to long-term contracts | 10.00% |
| Data trial contract period | 5 years |
| Subscription prepayment period | 3 years |
| Prepaid Vehicle Subscriptions | Minimum | |
| Disaggregation of Revenue [Line Items] | |
| Contract period (or less) | 3 months |
| Prepaid Vehicle Subscriptions | Maximum | |
| Disaggregation of Revenue [Line Items] | |
| Contract period (or less) | 12 months |
| X | ||||||||||
- Definition Revenue From Contract With Customer, Activation Fee Revenue Recognition Period No definition available.
|
| X | ||||||||||
- Definition Revenue From Contract With Customer, Contract Period No definition available.
|
| X | ||||||||||
- Definition Revenue From Contract With Customer, Data Trial Contract Period No definition available.
|
| X | ||||||||||
- Definition Revenue From Contract With Customer, Percent Of Deferred Revenue Related To Long-Term Contracts No definition available.
|
| X | ||||||||||
- Definition Revenue From Contract With Customer, Subscription Prepayment Period No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|
| X | ||||||||||
- Details
|