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Earnings per Share (Details) - $ / shares
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Net income (loss) per share (in usd per share) $ 0.02   $ 0.04  
Weighted average shares outstanding        
Weighted average shares outstanding for basic EPS 24,268,364 23,445,771 24,178,037 23,480,956
Effect of dilutive securities        
Warrants 165,055 (4,874) 42,751 6,314
Weighted average shares outstanding for diluted EPS 24,689,110 24,050,239 24,432,837 23,936,241
Options        
Effect of dilutive securities        
Share-based payment arrangements 12,083 4,139 6,886 6,089
Options outstanding 349,463   354,660  
Options, outstanding, weighted average exercise price during period $ 5.92   $ 5.84  
Restricted stock units        
Effect of dilutive securities        
Share-based payment arrangements 243,608 605,203 205,163 442,882
Options outstanding     51,948  
Equity instruments other than options, weighted average exercise price (in usd per share) $ 2.31   $ 2.31  
Warrants        
Effect of dilutive securities        
Options outstanding     675,000  
Equity instruments other than options, weighted average exercise price (in usd per share) $ 2.20   $ 2.20