Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Stock Based Compensation (Details 3)

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Stockholders' Equity and Stock Based Compensation (Details 3) - 2006 Plan and 2012 Plan - Restricted stock - USD ($)
6 Months Ended 12 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Dec. 31, 2013
Shares        
Nonvested shares at the beginning of the period 162,609      
Granted (in shares) 44,000   98,689 56,500
Vested (in shares) (39,774)      
Forfeited (in shares) (3,750)   (34,487) (775)
Nonvested shares at the end of the period 163,085   162,609  
Weighted Average Grant Date Fair Value        
Nonvested shares at the beginning of period (in dollars per share) $ 14.36      
Granted (in dollars per share) 14.99      
Vested (in dollars per share) 13.67      
Forfeited (in dollars per share) 12.61      
Nonvested shares at the end of period (in dollars per share) $ 14.37   $ 14.36  
Unrecognized compensation cost (in dollars) $ 2,300,000      
Weighted average period for recognition of unrecognized compensation cost 2 years 9 months 18 days      
Share-based compensation cost (in dollars) $ 534,000 $ 575,000