Contractual life of stock options and other awards under the shared-based compensation plans

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- Definition

The number of stock options that vested during the reporting period.

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section S99
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-Subparagraph (SAB Topic 14.F)
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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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-Publisher FASB
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- Definition

Unrecognized cost of unvested options awarded to employees as compensation.

+ References

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- Definition

The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

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-Publisher FASB
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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.

+ References

No definition available.

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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- Definition

The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

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- Definition

Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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- Definition

Number of share options (or share units) exercised during the current period.

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Share-Based Compensation - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	May 24, 2011	May 29, 2008
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted in the period (shares)	2,550,000	195,332
Exercise of share-based awards (shares)		77,914
Options vested in period (shares)	56,682	86,736
Aggregate fair value of options vested in period	$ 0.1	$ 0.3
Unrecognized compensation cost related to stock options	0.4
Selling, general and administrative expenses
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 0.8	$ 0.6
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average period for recognition of compensation cost	3 years 2 months 12 days
2008 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under the Plan (shares)				333,333
Options granted in the period (shares)	0	187,832
Remaining shares available for grant under the Plan	114,141
Contractual life of stock options and other awards under share-based compensation plans	10 years
Exercise of share-based awards (shares)	0	0
2011 Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares authorized under the Plan (shares)	3,650,000		633,333
Options granted in the period (shares)	2,550,000	7,500
Remaining shares available for grant under the Plan	567,893
Contractual life of stock options and other awards under share-based compensation plans	10 years
Exercise of share-based awards (shares)	0	0
2011 Plan \| Non-employee Board of Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of shares granted (shares)	435,800	166,665