Note 9 - Segment Data (Details Textual) (North America [Member], USD $) In Millions, unless otherwise specified	3 Months Ended	4 Months Ended
	Mar. 31, 2015	Apr. 30, 2015
Severance Costs	$ 2.9
Subsequent Event [Member]
Workforce Reduction, Number of Employees		306
Percentage of Workforce Reduction		25.00%
Corporate Segment [Member]
Severance Costs	0.1
Fluids Systems [Member]
Severance Costs	2.6
Mats and Integrated Services [Member]
Severance Costs	0.2
Employee Severance [Member]
Restructuring Reserve	1.3
Cost of Sales [Member]
Severance Costs	2.2
Selling, General and Administrative Expenses [Member]
Severance Costs	$ 0.7