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Stock-Based Compensation Plan (Schedule Of Valuation Assumptions Used In Computing Fair Value Of Stock-Based Awards) (Details) - Stock Options - $ / shares | 12 Months Ended
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Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Options granted |  | 463 |  |  |  |  |
2015 Plan [Member] | Vest In Four Equal Consecutive Quarterly Tranches From The Date Of Grant |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Options granted |  | 363 |  | 163 |  | 103 |
Dividend yield |  | 0.00% |  | 0.00% |  | 0.00% |
Risk-free interest rate |  | 1.80% |  |  |  |  |
2015 Plan [Member] | Vesting Immediately [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Options granted |  | 100 |  |  |  |  |
Grant price |  | $ 6.10 |  |  |  |  |
Dividend yield |  | 0.00% |  |  |  |  |
Expected Volatility | [1] | 46.90% |  |  |  |  |
Risk-free interest rate |  | 1.41% |  |  |  |  |
Expected life (years) | [2] | 2 years 9 months |  |  |  |  |
Weighted average fair value |  | $ 1.20 |  |  |  |  |
2015 Plan [Member] | Minimum [Member] | Vest In Four Equal Consecutive Quarterly Tranches From The Date Of Grant |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  | 1 year |  | 1 year |  | 1 year |
Grant price |  | $ 6.10 |  | $ 4.38 |  | $ 4.41 |
Expected Volatility |  | 41.90% | [1] | 43.00% | [1] | 45.00% | [3]
Risk-free interest rate |  |  |  | 1.14% |  | 1.56% |
Expected life (years) | [2] | 5 years 3 months 22 days |  | 5 years 3 months 22 days |  | 5 years 3 months 22 days |
Weighted average fair value |  | $ 2.45 |  | $ 1.81 |  | $ 1.85 |
2015 Plan [Member] | Maximum [Member] | Vest In Four Equal Consecutive Quarterly Tranches From The Date Of Grant |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting period |  | 2 years |  | 3 years |  | 4 years |
Grant price |  | $ 6.15 |  | $ 4.39 |  | $ 6.67 |
Expected Volatility |  | 42.20% | [1] | 44.60% | [1] | 53.00% | [3]
Risk-free interest rate |  |  |  | 1.23% |  | 2.11% |
Expected life (years) | [2] | 5 years 3 months 29 days |  | 6 years |  | 6 years 6 months 29 days |
Weighted average fair value |  | $ 2.49 |  | $ 1.85 |  | $ 3.53 |
2005 Plan [Member] | Vesting Immediately [Member] |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Options granted |  |  |  |  |  | 90 |
Grant price |  |  |  |  |  | $ 8.35 |
Dividend yield |  |  |  |  |  | 0.00% |
Expected Volatility | [3] |  |  |  |  | 44.40% |
Risk-free interest rate |  |  |  |  |  | 1.56% |
Expected life (years) | [2] |  |  |  |  | 5 years |
Weighted average fair value |  |  |  |  |  | $ 0.97 |
[1] | Expected volatility is based upon the Company's historical volatility.
[2] | Because the Company does not have sufficient historical exercise data to provide a reasonable basis upon which to estimate the expected term for these grants, the Company utilized the simplified method in developing an estimate of the expected term of these options.
[3] | Since a sufficient period of historical volatility did not exist, the Company's expected volatility was based on a combination of the Company's available historical volatility and the historical volatility of a peer group of companies within similar industries and similar size as the Company.

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- Definition 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. + 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 (a)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Agreed-upon price for the exchange of the underlying asset relating to the share-based payment award. + References No definition available. + Details
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- Definition The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term. + 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 (f)(2)(iii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period. + 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 (f)(2)(ii) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition The risk-free interest rate assumption that is used in valuing an option on its own shares. + 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 (f)(2)(iv) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + 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://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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- Definition Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + 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 (f)(2)(i) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 14.D.2) -URI http://asc.fasb.org/extlink&oid=27013229&loc=d3e301413-122809 + Details
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