Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation - Disclosure of Share-based Compensation Arrangements by Share-based Payment Award (Details)

v3.7.0.1
Stock-based Compensation - Disclosure of Share-based Compensation Arrangements by Share-based Payment Award (Details) - Restricted Stock Units (RSUs) [Member] - shares
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Outstanding and unvested at beginning 386,733 482,250
Granted 568,200 221,600
Vested (513,271) (193,367)
Forfeited (34,703) (123,750)
Outstanding and unvested at ending 406,959 386,733