Stock Options (Details) - Stock option [Member]	9 Months Ended
Sep. 30, 2018 USD ($) $ / shares shares
Number of options
Outstanding at January 1, 2018 \| shares	335,900
Number of options, Granted \| shares	129,000
Canceled/Forfeited \| shares	(19,500)
Outstanding at September 30, 2018 \| shares	445,400
Vested and exercisable at September 30, 2018 \| shares	278,567
Vested and exercisable at September 30, 2018 and expected to vest thereafter \| shares	445,400
Weighted average exercise price
Outstanding at January 1, 2018 \| $ / shares	$ 5.61
Granted \| $ / shares	3.21
Canceled/Forfeited \| $ / shares	4.57
Outstanding at September 30, 2018 \| $ / shares	4.96
Vested and exercisable at September 30, 2018 \| $ / shares	5.85
Vested and exercisable at September 30, 2018 and expected to vest thereafter \| $ / shares	$ 4.96
Weighted average contractual term (years)
Outstanding at September 30, 2018	7 years 2 months 23 days
Vested and exercisable at September 30, 2018	6 years 11 days
Vested and exercisable at September 30, 2018 and expected to vest thereafter	7 years 2 months 23 days
Aggregate intrinsic value
Outstanding at September 30, 2018 \| $
Vested and exercisable at September 30, 2018 \| $
Vested and exercisable at September 30, 2018 and expected to vest thereafter \| $

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Weighted average remaining contractual term for option awards outstanding.

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of fully vested and options that are exercisable.

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The number of exercisable share options that may be converted as of the balance sheet date.

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Share based compensation arrangement by share based payment award options vested and exercisable weighted average exercise price.

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Weighted average remaining contractual term for fully vested and expected to vest options that are 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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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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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest exercisable options that may be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for fully vested and expected to vest exercisable or convertible options. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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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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Weighted average remaining contractual term for fully vested and expected to vest exercisable or convertible options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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