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Share Based Compensation - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Aggregate number of shares of common stock authorized to issue under the Plans (shares) 1,856,733    
Shares available for future issuance under the Plans (shares) 582,983    
Number of shares reserved for issuance under the Plans 10,248    
Stock Options      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock options contractual term under the Plans 4 years 2 months 23 days    
Weighted average grabnt-date fair value of options granted (in dollars per share) $ 1.34   $ 0.70
Unrecognized compensation cost $ 0.2    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 2 years 6 months    
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options $ 0.8 $ 0.6 $ 0.2
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Total Intrinsic Value $ 1.1 $ 0.2 $ 0.1
Stock Options | Minimum [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock options requisite service period under the Plans 2 years    
Stock options contractual term under the Plans 7 years    
Stock Options | Maximum [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Stock options requisite service period under the Plans 4 years    
Stock options contractual term under the Plans 10 years    
Restricted Stock      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
Restricted stock settlement period under the Plans 36 months    
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition 1 year 10 months 17 days    
Weighted average grant-date fair value of the restricted stock units $ 5.28 $ 4.14 $ 3.81
Restricted Stock | Minimum [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
restricted stock vesting period under the Plans 1 year    
Restricted Stock | Maximum [Member]      
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]      
restricted stock vesting period under the Plans 3 years