Note 10 - Segment Data (Details Textual) - USD ($) $ in Millions	3 Months Ended	6 Months Ended	7 Months Ended
	Jun. 30, 2015	Jun. 30, 2015	Jul. 31, 2015
Subsequent Event [Member]
Workforce Reduction, Number of Employees			343
Percentage of Workforce Reduction			26.00%
North America [Member] | Cost of Sales [Member]
Severance Costs	$ 0.3	$ 2.5
North America [Member] | Selling, General and Administrative Expenses [Member]
Severance Costs	0.4	1.1
North America [Member] | Fluids Systems [Member]
Severance Costs	0.7	3.3
North America [Member] | Mats and Integrated Services [Member]
Severance Costs		0.2
North America [Member] | Corporate Segment [Member]
Severance Costs		0.1
North America [Member] | Employee Severance [Member]
Restructuring Reserve	0.4	0.4
North America [Member]
Severance Costs	$ 0.7	$ 3.6