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Share-Based Compensation (Narrative) (Details) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018 USD ($) $ / shares shares	Sep. 30, 2017 USD ($) $ / shares	Sep. 30, 2018 USD ($) shares	Sep. 30, 2017 USD ($)	May 04, 2018 shares	May 07, 2015 shares	May 31, 2012 shares	May 31, 2005 shares
Nonemployee director annual stock grants | shares			25,000
Stock or Unit Option Plan Expense | $	$ 337	$ 405	$ 2,131	$ 2,270
Unrecognized compensation cost | $	$ 945		$ 945
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value | $ / shares	$ 4.49	$ 5.75
2012 Plan [Member]
Shares available for grants | shares	891,668		891,668		3,500,000	3,000,000	1,500,000
Stock Option Plan, Award Vesting Period			5 years
Common stock on date granted term period, years			10
Prior To Shareholder Approval of Increase [Member]
Nonemployee director annual stock grants | shares			15,000
Prior To Shareholder Approval of Second Amendment [Member]
Nonemployee director annual stock grants | shares			20,000
2005 Plan [Member]
Shares available for grants | shares								1,500,000
Stock Option Plan, Award Vesting Period	10 years
Common stock on date granted term period, years	10
Expected To Be Recognized During 2018 [Member]
Unrecognized compensation cost | $	$ 359		$ 359
Expected To Be Recognized During 2019 [Member]
Unrecognized compensation cost | $	528		528
Expected To Be Recognized During 2020 [Member]
Unrecognized compensation cost | $	$ 58		$ 58

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Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (i)
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
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-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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

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-Name Accounting Standards Codification
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901

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- Definition

The noncash expense that accounts for the value of stock or unit options distributed to employees as compensation.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
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-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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