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Stockholders' Equity (Details 1) - Stock Option [Member]	6 Months Ended
	Jun. 30, 2019 $ / shares shares
Stock Options:
Number of Options, Outstanding beginning balance | shares	1,037,797
Number of Options, Granted | shares	193,294
Number of Options, Forfeited or canceled, during the period | shares	(152,215)
Number of Options, Expired, during the period | shares	(21,187)
Number of Options, Outstanding ending balance | shares	1,057,689
Number of Options, Exercisable | shares	712,118
Weighted Average Exercise Price, Outstanding beginning balance | $ / shares	$ 5.36
Weighted Average Exercise Price, Granted | $ / shares	3.71
Weighted Average Exercise Price, Forfeited or canceled, during the period | $ / shares	4.47
Weighted Average Exercise Price, Expired, during the period | $ / shares	4.55
Weighted Average Exercise Price, Outstanding ending balance | $ / shares	4.96
Weighted Average Exercise Price, Exercisable | $ / shares	$ 5.50

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.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iii)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

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.

+ References

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-Publisher FASB
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-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(iv)(4)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

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- Definition

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.

+ References

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- Definition

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 grantees can acquire the shares reserved for issuance under the stock option plan.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options of the plan that expired.

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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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