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Stock Based Compensation (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense $ 469 $ 487
Stock-based compensation expense, tax benefit $ 262 $ 197
No. of Shares [Roll Forward]    
Outstanding (in shares) 933  
Options granted (in shares) 133  
Options exercised (in shares) (5)  
Forfeited and cancelled (in shares) (82)  
Expired (in shares) (30)  
Outstanding (in shares) 949 933
Vested and expected to vest (in shares) 1,062  
Total shares exercisable (in shares) 397  
Shares remaining available for grant (in shares) 701  
Weighted Average Exercise Price [Roll Forward]    
Outstanding (in dollars per share) $ 5.14  
Options granted (in dollars per share) 5.48  
Options Exercised (in dollars per share) 5.32  
Forfeited and cancelled (in dollars per share) 4.85  
Expired (in dollars per share) 4.63  
Outstanding (in dollars per share) 5.22 $ 5.14
Vested and expected to vest (in dollars per share) 5.26  
Total shares exercisable (in dollars per share) $ 5.22  
Aggregate Intrinsic Value [Abstract]    
Outstanding $ 1,579  
Outstanding 264 $ 1,579
Vested and expected to vest 260  
Total shares exercisable $ 111  
Weighted average grant date fair value of options granted (in dollars per share) $ 1.81 $ 1.44
Total intrinsic value of options exercised $ 58 $ 119
Assumptions used for fair value of options at the date of the grant [Abstract]    
Expected option life 5 years 8 months 12 days 5 years 1 month 6 days
Weighted average risk-free interest rate 1.30% 1.60%
Weighted average expected volatility 33.00% 30.00%
Expected dividend yield 0.00% 0.00%
Unrecognized compensation expense $ 500  
Period for recognition 2017 through 2019  
Weighted average grant date fair value [Roll Forward]    
Restricted stock awards granted (in shares) 168 34
Share price (in dollars per share) $ 0.02 $ 0.02
Weighted average grant date fair value (in dollars per share) $ 5.23 $ 4.67
Shares released (in shares) (85) (110)
Restricted stock awards cancelled (in shares) (46) (112)
Restricted Stock [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Total stock-based compensation expense $ 72 $ 182
Restricted Stock [Member] | Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 1 year  
Restricted Stock [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 3 years  
Performance Based Restricted Stock [Member]    
Weighted average grant date fair value [Roll Forward]    
Restricted stock awards cancelled (in shares) (45) (102)
Performance Based Restricted Stock [Member] | Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 1 year  
Performance Based Restricted Stock [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 3 years  
Non-vested Equity Awards [Member]    
Activity of nonvested options outstanding [Roll Forward]    
Balance (in shares) 85  
Granted (in shares) 168  
Vested (in shares) (44)  
Forfeited and cancelled (in shares) (46)  
Balance (in shares) 163 85
Weighted average grant date fair value [Roll Forward]    
Balance (in dollars per share) $ 5.13  
Granted (in dollars per share) 5.23  
Vested (in dollars per share) 4.94  
Forfeited and cancelled (in dollars per share) 5.31  
Balance (in dollars per share) $ 5.26 $ 5.13
2015 Equity Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Number of shares authorized under plan approved by directors (in shares) 1,000  
2015 Equity Incentive Plan [Member] | Minimum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 1 year  
2015 Equity Incentive Plan [Member] | Maximum [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Vesting period 3 years  
Expiration period 10 years  
$4.72 to $7.08 [Member]    
Share-based Compensation, Shares Authorized under Stock Option Plans, Exercise Price Range [Line Items]    
Lower Range of Exercise Price (in dollars per share) $ 4.72  
Upper Range of Exercise Price (in dollars per share) $ 7.08  
Number Outstanding (in shares) 1,082  
Weighted Average Remaining Life 7 years 6 months 7 days  
Weighted Average Exercise Price (in dollars per share) $ 5.22