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Share-Based Compensation (Narrative) (Details) - USD ($)
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Jun. 30, 2013
Jun. 30, 2010
Jun. 30, 2007
Jan. 31, 1996
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Recognized compensation expense $ 71,000 $ 113,000 $ 160,000 $ 201,000          
Restricted stock granted in period 0 0 0 0          
Restricted stock expense $ 0 $ 15,000 $ 1,000 $ 30,000          
Stock Incentive Plans [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Granted non-qualified options 24,000 14,000 126,000            
Stock option shares of restricted stock vested 0 2,000 94 4,000          
Forfeited restricted stock 1,031 0 1,031 938          
Options remained outstanding under option plan 726,000   726,000   630,000        
Weighted-average grant-date fair value of stock options granted $ 1.94 $ 2.65              
Total unrecognized compensation costs related to unvested stock options $ 600,000   $ 600,000            
Weighted average recognition period     2 years 9 months            
Fair value of stock options vested 100,000 $ 100,000 $ 200,000 $ 100,000          
Cash received from exercise of stock options $ 21,000 17,000 $ 27,000 100,000          
2007 Stock Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Number of shares authorized 2,002,209   2,002,209     1,502,209 1,250,000 1,000,000  
Shares available for grant 500,000   500,000            
Options remained outstanding under option plan 700,000   700,000   600,000        
Employee Stock Purchase Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Recognized compensation expense $ 3,000 4,000 $ 8,000 11,000          
Number of shares authorized 550,000   550,000            
Cash received from exercise of stock options $ 11,000 $ 16,000 $ 33,000 $ 43,000          
Maximum employee subscription rate 15.00%   15.00%            
Maximum value of shares per employee     $ 25,000            
Maximum number of shares per employee     10,000            
Purchase price of stock     85.00%            
Shares available for purchase under ESPP 57,000   57,000            
Discount on the purchase price of stock option     15.00%            
Issued shares related to the ESPP 1,000 2,000 4,000 6,000          
Option Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Amended and restated stock option plan, reserved for issuance                 4,175,000
Vesting period     4 years            
Option plan termination date     Jan. 18, 2006            
Options remained outstanding under option plan 100,000   100,000   100,000        
Maximum [Member] | 2007 Stock Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Option expiration period     10 years            
Maximum [Member] | Option Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Option expiration period     10 years            
Employees [Member] | 2007 Stock Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period     4 years            
Directors [Member] | 2007 Stock Plan [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Vesting period     1 year            
Senior Management [Member] | Minimum [Member] | Stock Incentive Plans [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Release period for restricted stock options     2 years            
Senior Management [Member] | Maximum [Member] | Stock Incentive Plans [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Release period for restricted stock options     4 years            
Board Members [Member] | Stock Incentive Plans [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Release period for restricted stock options     1 year            
Evolving Systems U.K. [Member] | Stock Incentive Plans [Member]                  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]                  
Deferred income tax benefits from stock option expense $ 5,000 $ 4,000 $ 9,000 $ 8,000