Annual report pursuant to Section 13 and 15(d)

Description of Business (Details)

v3.10.0.1
Description of Business (Details) - Skyhook
$ in Millions
12 Months Ended
Feb. 14, 2014
USD ($)
Dec. 31, 2018
item
Business Acquisition [Line Items]    
Number Of Primary Products | item   2
Skyhook    
Business Acquisition [Line Items]    
Voting interest acquired (as a percent) 100.00%  
Cash paid for acquisition | $ $ 57.5