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Share-based Compensation - Schedule of Stock Options Activity (Details)
 9 Months Ended
Sep. 30, 2016
$ / shares
shares
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]  
Number of shares Options, Outstanding at beginning of period | shares 1,028,935
Number of shares Options, Granted | shares 204,700
Number of shares Options, Exercised | shares 147,085
Number of shares Options, Repurchased | shares 225,542
Number of shares Options, Canceled or Expired | shares 19,192
Number of shares Options, Outstanding at end of period | shares 841,816
Number of shares Options, Exercisable at end of period | shares 537,200
Weighted Average Exercise Price, Outstanding at beginning of period | $ / shares $ 6.03
Weighted Average Exercise Price, Granted | $ / shares 11.77
Weighted Average Exercise Price, Exercised | $ / shares 4.56
Weighted Average Exercise Price, Repurchased | $ / shares 4.37
Weighted Average Exercise Price, Canceled or Expired | $ / shares 11.30
Weighted Average Exercise Price, Outstanding at end of period | $ / shares 8.01
Weighted Average Exercise Price, Exercisable at end of period | $ / shares $ 6.22