Capital Stock (Details 1) - $ / shares	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Opening Balance Stock Options Outstanding	3,780,244
Begining Balance Weighted Average Exercise Price	$ 3.95
Options, Grants in Period, Gross	0
Options, Grants in Period, Weighted Average Exercise Price	$ 0
Options, Exercises in Period, Weighted Average Exercise Price	$ 3.06
Stock option exercises during the year, Shares	(297,874)
Options, Forfeitures and Expirations in Period	(119,554)
Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price	$ 4.9
Closing Balance Stock Options Outstanding	3,362,816
Closing Balance Weighted Average Exercise Price	$ 3.99
Begining Balance Restricted Stock Units Outstanding	1,796,927
Restricted stock units, Grants in Period	140,763
Retricted Stock Units, Vested in Period	(531,999)
Restricted Stock Units, cancelled/ forfeited	(17,078)
Closing Balance Restricted Stock Units Outstanding	1,388,613
Begining Balance Grant Date Fair Value Of Restricted Stock Units	$ 2.69
Granted, Restricted Stock Units Grant Date Fair Value	3.61
Vested in period, Restricted Stock Unit, Fair Value	3
Forfeited in Period, Restricted Stock Unit Grant Date Fair Value	2.9
Closing Balance Grant Date Fair Value Of Restricted Stock Units	$ 2.66
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions and Methodology [Abstract]
Fair Value Assumptions, Expected Volatility Rate		41.07%
Fair Value Assumptions, Risk Free Interest Rate		1.89%
Fair Value Assumptions, Expected Term		5 years 2 months
Fair Value Assumptions, Expected Dividend Rate		0.00%
Market Condition Restricted Stock Unit [Member]
Share-Based Compensation Arrangement By Share-Based Payment Award [Line Items]
Begining Balance Restricted Stock Units Outstanding	164,127
Restricted stock units, Grants in Period	0
Retricted Stock Units, Vested in Period	0
Restricted Stock Units, cancelled/ forfeited	(16,328)
Closing Balance Restricted Stock Units Outstanding	147,799
Begining Balance Grant Date Fair Value Of Restricted Stock Units	$ 4.81
Granted, Restricted Stock Units Grant Date Fair Value	0
Forfeited in Period, Restricted Stock Unit Grant Date Fair Value	4.81
Closing Balance Grant Date Fair Value Of Restricted Stock Units	$ 4.81

The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were not exercised or put into effect as a result of the occurrence of a terminating event.

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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).

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The weighted average fair value at grant date for nonvested equity-based awards issued 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).

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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.

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The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

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The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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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.

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No definition available.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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Weighted average price of options that were either forfeited or expired.

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- Definition

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

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No definition available.

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Number of options outstanding, including both vested and non-vested options.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

Weighted average price at which option holders acquired shares when converting their stock options into shares.

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No definition available.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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- Definition

Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average grant-date fair value of options vested.

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The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

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

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