Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation and Accounting Policies Revenue Recognition (Details)

v3.7.0.1
Basis of Presentation and Accounting Policies Revenue Recognition (Details) - USD ($)
$ in Thousands
6 Months Ended
Jun. 30, 2017
Jun. 30, 2016
Dec. 31, 2016
Dec. 31, 2015
Deferred Revenue $ 9,290 $ 6,953 $ 6,953 $ 6,953
Deferred Revenue, Additions 2,337 $ 0    
Domestic Destination [Member]        
Deferred Revenue 6,800      
Geographic Distribution, Foreign [Member]        
Deferred Revenue $ 2,300