Segment Reporting and Geographic Information (Details 1) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Sep. 30, 2018
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 30.7	$ 153.4	$ 141.4
UK [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	18.6	103.7	89.6
Greece [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	4.8	20.7	23.4
Italy [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	5.1	16.2	18.6
Rest of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 2.2	$ 12.8	$ 9.8