XML 59 R66.htm IDEA: XBRL DOCUMENT v3.20.1
Commitments and contingencies (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Commitments and contingencies    
Non-cancellable obligations $ 13.1 $ 13.9
2020 deliverables 10.2  
2021 deliverables 2.9  
2022 deliverables 0.0  
Licensing fees from intellectual property licenses $ 1.9 $ 0.1