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Stock-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | May 03, 2019 | May 04, 2018 | May 07, 2015 | May 31, 2012
Nonemployee director annual stock grants |  |  | 25,000 |  |  |  |  |
Document Period End Date |  |  | Jun. 30, 2019 |  |  |  |  |
Share-based Payment Arrangement, Expense | $ 477 | $ 368 | $ 2,478 | $ 1,794 |  |  |  |
Unrecognized compensation cost | $ 1,821 |  | $ 1,821 |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value |  |  | $ 6.17 | $ 4.49 |  |  |  |
2012 Plan [Member] |  |  |  |  |  |  |  |
Shares available for grants | 319,669 |  | 319,669 |  |  | 3,500,000 | 3,000,000 | 1,500,000
Stock Option Plan, Award Vesting Period |  |  | 5 years |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  |  | 10 years |  |  |  |  |
Prior To Shareholder Approval of Increase [Member] |  |  |  |  |  |  |  |
Nonemployee director annual stock grants |  |  | 15,000 |  |  |  |  |
Prior To Shareholder Approval of Second Amendment [Member] |  |  |  |  |  |  |  |
Nonemployee director annual stock grants |  |  | 20,000 |  |  |  |  |
2019 Plan [Member] |  |  |  |  |  |  |  |
Shares available for grants |  |  |  |  | 3,000,000 |  |  |
Stock Option Plan, Award Vesting Period |  |  | 5 years |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period |  |  | 10 years |  |  |  |  |
Expected To Be Recognized During 2019 [Member] |  |  |  |  |  |  |  |
Unrecognized compensation cost | $ 953 |  | $ 953 |  |  |  |  |
Expected To Be Recognized During 2020 [Member] |  |  |  |  |  |  |  |
Unrecognized compensation cost | 776 |  | 776 |  |  |  |  |
Expected To Be Recognized During 2021 [Member] |  |  |  |  |  |  |  |
Unrecognized compensation cost | $ 92 |  | $ 92 |  |  |  |  |

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- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5047-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.F) -URI http://asc.fasb.org/extlink&oid=115993241&loc=d3e301413-122809 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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- Definition 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. + 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 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
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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=116856206&loc=d3e5070-113901 + Details
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