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Stockholders' Equity (Details 3) - Employee Stock Option [Member] - $ / shares	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Non-vested stock options at January 1	238,871	335,283
Granted - Number of Options	224,000	127,000
Vested - Number of Options	(122,647)	(207,457)
Exercised - Number of Options	0	0
Forfeited/Expired/Exchanged - Number of Options	(47,909)	(15,955)
Non-vested stock options at December 31	292,315	238,871
Non-vested stock options - Weighted Average Grant Date Fair Value	$ 4.27	$ 5.09
Granted - Weighted Average Grant Date Fair Value	1.94	3.74
Vested - Weighted Average Grant Date Fair Value	4.15	5.16
Exercised - Weighted Average Grant Date Fair Value	0	0
Forfeited/Expired/Exchanged - Weighted Average Grant Date Fair Value	3.82	5.15
Non-vested stock options - Weighted Average Grant Date Fair Value	$ 2.61	$ 4.27

X

- Definition

The weighted average fair value at grant date of nonvested stock options exercised during the period.

+ References

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Number of non vested options exercised during the period.

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Number of non vested options granted during the period.

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ 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 (d)(1)
-URI http://asc.fasb.org/extlink&oid=109197908&loc=d3e5070-113901

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Number of non-vested options outstanding.

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