Shareholders' Equity and Capital Stock - o/s RSUs (Details) - USD ($) $ in Thousands |
3 Months Ended | |
|---|---|---|
Mar. 31, 2018 |
Dec. 31, 2017 |
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| RSUs | ||
| Number of unvested units | 1,095,438 | 1,175,952 |
| Remaining life (years) | 1 year 5 months 1 day | |
| Aggregate Intrinsic Value | $ 668 | |
| August 17, 2015 [Member] | ||
| RSUs | ||
| Number of unvested units | 591,404 | |
| Remaining life (years) | 8 months 16 days | |
| Aggregate Intrinsic Value | $ 361 | |
| December 11, 2015 [Member] | ||
| RSUs | ||
| Number of unvested units | 504,034 | |
| Remaining life (years) | 1 year 8 months 16 days | |
| Aggregate Intrinsic Value | $ 307 |
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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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