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Stock-Based Compensation - Restricted Stock Awards (Details) - Restricted Stock [Member] - USD ($)
$ / shares in Units, $ in Thousands
3 Months Ended
Mar. 10, 2016
Mar. 31, 2016
Mar. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Restricted stock issued (in shares) 559,000    
Fair value per share of restricted stock awards (in dollars per share) $ 2.06    
Share-based compensation expense   $ 334 $ 392
Unrecognized compensation expense   $ 2,240  
Unrecognized compensation expense, weighted-average period of recognition (in years)   2 years 8 months 26 days