Schedule of Geographic Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	$ 208.9	$ 199.8	$ 153.4
Total non-current assets excluding goodwill	122.6	131.4
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	149.1	152.3	103.7
Total non-current assets excluding goodwill	90.0	101.8
GREECE
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	18.6	17.0	20.7
Total non-current assets excluding goodwill	11.6	18.2
Rest of World [Member]
Revenues from External Customers and Long-Lived Assets [Line Items]
Total revenue	41.2	30.5	$ 29.0
Total non-current assets excluding goodwill	$ 21.0	$ 11.4