Shareholders' Equity and Capital Stock - o/s RSUs (Details) - USD ($) $ in Thousands |
12 Months Ended | |||||
|---|---|---|---|---|---|---|
Dec. 11, 2015 |
Aug. 17, 2015 |
Dec. 31, 2017 |
Dec. 31, 2016 |
Dec. 31, 2015 |
Dec. 31, 2014 |
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| RSUs | ||||||
| Number of unvested units | 1,175,952 | 1,273,990 | 860,095 | 379,435 | ||
| Remaining life (years) | 1 year 5 months 1 day | |||||
| Aggregate Intrinsic Value | $ 812 | |||||
| August 17, 2015 [Member] | ||||||
| RSUs | ||||||
| Grant date | Dec. 16, 2016 | |||||
| Number of unvested units | 634,294 | |||||
| Remaining life (years) | 11 months 16 days | |||||
| Aggregate Intrinsic Value | $ 438 | |||||
| Share-Based Compensation Arrangement By Share-Based Number Four Member | ||||||
| RSUs | ||||||
| Grant date | Dec. 15, 2017 | |||||
| Number of unvested units | 541,658 | |||||
| Remaining life (years) | 1 year 11 months 16 days | |||||
| Aggregate Intrinsic Value | $ 374 |
| X | ||||||||||
- Definition Restricted stock units issuance date for equity-based awards excluding options. No definition available.
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- Definition The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Weighted average remaining contractual term for equity-based awards excluding options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- 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.
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