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Income (Loss) Per Share - Additional Information (Details) - shares
3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Income Per Share (Textual) [Abstract]        
Additional dilutive shares related to share-based compensation 140,000 280,000 176,000 353,000
Stock options        
Income Per Share (Textual) [Abstract]        
Common stock shares effect would be anti-dilutive     7,386 29,000