Condensed Consolidated Statements of Operations and Comprehensive Loss (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Revenue:
Total revenue	$ 26.7	$ 36.9	$ 60.4	$ 74.4
Cost of sales, excluding depreciation and amortization:
Selling, general and administrative expenses	(12.8)	(15.2)	(27.5)	(30.9)
Stock-based compensation expense	(2.3)	(1.5)	(4.4)	(2.7)
Acquisition related transaction expenses	(0.7)		(1.6)	(0.2)
Depreciation and amortization	(9.1)	(10.6)	(18.8)	(21.7)
Net operating loss	(4.5)	1.6	(5.2)	0.8
Other (expense) income
Interest income	0.1		0.1	0.1
Interest expense	(4.0)	(5.2)	(8.5)	(10.3)
Change in fair value of earnout liability		(0.6)	(2.3)	3.1
Change in fair value of derivative liability	(1.3)		(0.1)	1.5
Other finance income (expense)	(0.9)	0.2	0.3	0.4
Total other expense, net	(6.1)	(5.6)	(10.5)	(5.2)
Loss before income taxes	(10.6)	(4.0)	(15.7)	(4.4)
Income tax benefit (expense)	(0.1)			(0.1)
Net loss	(10.7)	(4.0)	(15.7)	(4.5)
Other comprehensive (loss)/income:
Foreign currency translation (loss)/gain	0.7	(0.2)	0.2	0.1
Change in fair value of hedging instrument	2.4		0.3
Reclassification of gain on hedging instrument to comprehensive income	(2.6)		(1.1)
Actuarial (losses) gains on pension plan	(2.0)	3.0	(1.1)	4.3
Other comprehensive (loss)/income	(1.5)	2.8	(1.7)	4.4
Comprehensive loss	$ (12.2)	$ (1.2)	$ (17.4)	$ (0.1)
Net loss per common share - basic and diluted (in dollars per share)	$ (0.48)	$ (0.19)	$ (0.73)	$ (0.22)
Weighted average number of shares outstanding during the period - basic and diluted (in shares)	22,193,955	20,860,591	21,583,648	20,859,711
Service
Revenue:
Total revenue	$ 25.6	$ 34.5	$ 56.4	$ 67.8
Cost of sales, excluding depreciation and amortization:
Cost of goods and services sold	(5.3)	(5.9)	(10.7)	(11.9)
Hardware
Revenue:
Total revenue	1.1	2.4	4.0	6.6
Cost of sales, excluding depreciation and amortization:
Cost of goods and services sold	$ (1.0)	$ (2.1)	$ (2.6)	$ (6.2)