Segment Reporting (Details) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2018 USD ($) segment	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)
Segment Reporting
Number of reportable segments | segment	2
Revenues	$ 62.6	$ 29.1
Cost of services	51.3	23.9	$ 23.9
Depreciation and amortization	6.1	3.6	3.6
Impairment of goodwill	9.0
Operating income (loss)	(10.8)	(5.7)
Interest expense, net	(0.4)	(0.5)
Net income (loss)	(10.3)	(6.2)	(6.2)
Capital expenditures	12.3		11.8
Property, plant and equipment	199.9		189.2
Total assets	262.5		259.7
Well Services
Segment Reporting
Revenues	59.7	27.3
Cost of services	49.9	23.2
Processing Solutions
Segment Reporting
Revenues	2.9	1.8
Cost of services	1.4	0.7
Operating Segments | Well Services
Segment Reporting
Revenues	59.7	27.3
Cost of services	49.9		23.2
Depreciation and amortization	5.6		3.3
Impairment of goodwill	9.0
Operating income (loss)	(4.8)	(5.9)
Interest expense, net		(0.5)
Net income (loss)	(3.7)		(6.4)
Capital expenditures	10.1		11.7
Property, plant and equipment	166.2		157.4
Total assets	226.3		225.1
Operating Segments | Processing Solutions
Segment Reporting
Revenues	2.9	1.8
Cost of services	1.4		0.7
Depreciation and amortization	0.3		0.3
Operating income (loss)	0.5	$ 0.2
Net income (loss)	0.5		0.2
Capital expenditures	2.2		0.1
Property, plant and equipment	27.4		25.4
Total assets	29.9		28.2
Other
Segment Reporting
Depreciation and amortization	0.2
Operating income (loss)	(6.5)
Interest expense, net	(0.4)
Net income (loss)	(7.1)
Property, plant and equipment	6.3		6.4
Total assets	$ 6.3		$ 6.4