Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Equity (Summary of RSUs activity) (Details)

v3.8.0.1
Equity (Summary of RSUs activity) (Details) - Restricted Stock Units (RSUs) [Member]
9 Months Ended
Sep. 30, 2017
$ / shares
shares
Number of RSUs  
Unvested RSUs outstanding, beginning | shares 267,756
Granted | shares 267,014
Forfeited | shares (111,299)
Vested | shares (80,233)
Unvested RSUs outstanding, ending | shares 343,238
Weighted Average Grant Date Fair Value  
Unvested RSUs outstanding, beginning | $ / shares $ 81.35
Granted | $ / shares 20.12
Forfeited | $ / shares 75.54
Vested | $ / shares 55.22
Unvested RSUs outstanding, ending | $ / shares $ 41.71