Stock Compensation (Schedule of Option Activity) (Details)	12 Months Ended
Dec. 31, 2018 USD ($) $ / shares shares
Stock Compensation [Abstract]
Number of Shares, Outstanding at December 31, 2017 \| shares	4,768,838
Number of Shares, Options granted \| shares	587,350
Number of Shares, Options exercised \| shares	(99,937)
Number of Shares, Options forfeited \| shares	(66,667)
Number of Shares, Options cancelled or expired \| shares	(511,164)
Number of Shares, Outstanding at December 31, 2018 \| shares	4,678,420
Number of Shares, Vested or expected to vest at December 31, 2018 \| shares	4,671,164
Number of Shares, Exercisable at December 31, 2018 \| shares	4,315,667
Weighted Average Exercise Price, Outstanding at December 31, 2017 \| $ / shares	$ 3.02
Weighted Average Exercise Price, Options granted \| $ / shares	1.78
Weighted Average Exercise Price, Options exercised \| $ / shares	0.98
Weighted Average Exercise Price, Options forfeited \| $ / shares	1.78
Weighted Average Exercise Price, Options cancelled or expired \| $ / shares	4.15
Weighted Average Exercise Price, Outstanding at December 31, 2018 \| $ / shares	2.81
Weighted Average Exercise Price, Vested or expected to vest at December 31, 2018 \| $ / shares	2.81
Weighted Average Exercise Price, Exercisable at December 31, 2018 \| $ / shares	$ 2.87
Weighted Average Remaining Contractual Life (In Years), Outstanding at December 31, 2018	4 years 1 month 6 days
Weighted Average Remaining Contractual Life (In Years), Vested or expected to vest at December 31, 2018	4 years 2 months 1 day
Weighted Average Remaining Contractual Life (In Years), Exercisable at December 31, 2018	4 years 15 days
Aggregate Intrinsic Value, Outstanding at December 31, 2018 \| $	$ 12,375
Aggregate Intrinsic Value, Vested or expected to vest at December 31, 2018 \| $	12,375
Aggregate Intrinsic Value, Exercisable at December 31, 2018 \| $	$ 12,375

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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 remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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