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Stockholders' Equity (Details 1) - Stock Options [Member] - $ / shares	9 Months Ended	12 Months Ended
	Sep. 30, 2018	Dec. 31, 2017
Stock Options:
Number of Options, Outstanding, Beginning balance	980,588	573,110
Number of Options, Granted	120,130	611,522
Number of Options, Exercised	(6,363)
Number of Options, Expired or canceled, during the period	(1,429)	(191,027)
Number of Options, Forfeited, during the period	(25,399)	(13,017)
Number of Options, Outstanding, Ending balance	1,067,527	980,588
Number of Options, Exercisable	559,232	448,890
Weighted Average Exercise Price, Outstanding, Beginning balance	$ 5.02	$ 6.94
Weighted Average Exercise Price, Granted	5.95	3.75
Weighted Average Exercise Price, Exercised	4.43
Weighted Average Exercise Price, Expired or canceled, during the period	42.35	6.64
Weighted Average Exercise Price, Forfeited, during the period	4.45	6.00
Weighted Average Exercise Price, Outstanding, Ending balance	5.10	5.02
Weighted Average Exercise Price, Exercisable	$ 6.05	$ 8.36

X

- Definition

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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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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Number of options or other stock instruments for which the right to exercise has lapsed under the terms of the plan agreements.

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

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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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