Segment Reporting and Geographic Information (Details 1) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 26.7	$ 36.9	$ 60.4	$ 74.4
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	4.2	4.2	8.4	9.0
UK [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	15.5	22.6	37.7	47.2
Greece [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	4.8	7.6	9.6	13.1
Rest of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 2.2	$ 2.5	$ 4.7	$ 5.1