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Stock Compensation Plans (Stock Plans and Stock Options) (Details) - USD ($)	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense	$ 1,100,000	$ 800,000	$ 1,600,000
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Number of shares outstanding at beginning of period	1,709,967
Number of shares granted	25,000
Number of shares exercised	(33,870)
Number of shares canceled and expired	(638,630)
Number of shares outstanding at end of period	1,062,467	1,709,967
Number of shares vested and expected to vest	1,062,467
Number of shares exercisable	962,467
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Roll Forward]
Weighted average exercise price outstanding at beginning of period	$ 4.76
Weighted average exercise price, granted	3.50
Weighted average exercise price, exercised	2.64
Weighted average exercise price, canceled and expired	3.75
Weighted average exercise price outstanding at end of period	5.42	$ 4.76
Weighted average exercise price, vested and expected to vest	5.42
Weighted average exercise price, exercisable	$ 5.72
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining life, outstanding	1 year 9 months 22 days
Weighted average remaining life, vested and expected to vest	1 year 9 months 22 days
Weighted average remaining life, exercisable	1 year 10 months 28 days
Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract]
Intrinsic value, outstanding	$ 1,240
Intrinsic value, vested and expected to vest	1,240
Intrinsic value, exercisable	$ 1,004

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Share-based Compensation Arrangement by Share-based Payment Award, Options, Aggregate Intrinsic Value [Abstract]

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Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

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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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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. 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 options outstanding that can 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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