Quarterly report pursuant to Section 13 or 15(d)

Summary of Significant Accounting Policies - Share-based Compensation (Details)

v3.5.0.2
Summary of Significant Accounting Policies - Share-based Compensation (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2016
Sep. 30, 2015
Sep. 30, 2016
Sep. 30, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock-based compensation expense $ 328 $ 396 $ 1,086 $ 1,367
Stock Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Non-vested stock options unrecognized compensation expense $ 3,306   $ 3,306  
Non-vested stock options unrecognized compensation expense, weighted-average period of recognition     2 years 10 months 2 days