Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity and Stock Based Compensation (Details 2)

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Stockholders' Equity and Stock Based Compensation (Details 2) - Options
 9 Months Ended
Sep. 30, 2015
$ / shares
shares
Number of Options  
Outstanding at the beginning of the period (in shares) | shares 50,640
Canceled (in shares) | shares (6,000)
Exercised (in shares) | shares (44,640)
Weighted Average Exercise Price  
Outstanding at the beginning of the period (in dollars per share) $ 12.85
Canceled (in dollars per share) 12.85
Exercised (in dollars per share) 12.85
Aggregate Intrinsic Value  
Market value (in dollars per share) $ 17.00