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Shareholders' Equity (Details) - Employee option activity [Member] $ / shares in Units, $ in Thousands	6 Months Ended
	Jun. 30, 2018 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of options, Outstanding | shares	309,309
Number of options, Granted | shares
Number of options, Exercised | shares	(625)
Number of options, Forfeited | shares	(21,875)
Number of options, Outstanding | shares	286,809
Number of options, Exercisable | shares	280,559
Weighted average exercise price, Outstanding | $ / shares	$ 4.38
Weighted average exercise price, Granted | $ / shares
Weighted average exercise price, Exercised | $ / shares	4.00
Weighted average exercise price, Forfeited | $ / shares	6.89
Weighted average exercise price, Outstanding | $ / shares	4.19
Weighted average exercise price, Exercisable | $ / shares	$ 4.15
Weighted average remaining contractual term (in years), Outstanding	3 years 11 months 19 days
Weighted average remaining contractual term (in years), Outstanding	3 years 2 months 30 days
Weighted average remaining contractual term (in years), Exercisable	3 years 2 months 16 days
Aggregate intrinsic value, Outstanding | $	$ 1,237
Aggregate intrinsic value, Outstanding | $	1,179
Aggregate intrinsic value, Exercisable | $	$ 1,165

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- Definition

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

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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-Section 50
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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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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.

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

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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

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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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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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