Annual report pursuant to Section 13 and 15(d)

Summary of Significant Accounting Policies - Impairment of Long-Lived Assets (Details)

v3.6.0.2
Summary of Significant Accounting Policies - Impairment of Long-Lived Assets (Details) - USD ($)
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Accounting Policies [Abstract]      
Impairment charges $ 0 $ 0 $ 0