Quarterly report pursuant to Section 13 or 15(d)

Basis of Presentation (Details)

v3.8.0.1
Basis of Presentation (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2018
USD ($)
product
Mar. 31, 2017
USD ($)
May 18, 2016
Voting interest acquired (as a percent)     25.01%
Liberty      
Related Party Transaction, Amounts of Transaction | $ $ 950 $ 746  
Skyhook      
Number of primary products sold | product 2