Annual report pursuant to Section 13 and 15(d)

Stock-Based Compensation Plan (Schedule Of Valuation Assumptions Used In Computing Fair Value Of Stock-Based Awards) (Details)

v3.8.0.1
Stock-Based Compensation Plan (Schedule Of Valuation Assumptions Used In Computing Fair Value Of Stock-Based Awards) (Details) - Stock Options - $ / shares
12 Months Ended
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.