Note 12 - Segment and Related Information (Details Textual) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Fluids Systems [Member] | Cost of Sales [Member]
Inventory Write-down	$ 2,200
Fluids Systems [Member]
Inventory Write-down	2,200		$ 2,200
Tangible Asset Impairment Charges	2,600		2,600
Asset Impairment Charges and Legal Fees	70,700		70,700
Severance Costs			7,200
Asset Impairment Charges	75,500		75,500
Mats and Integrated Services [Member]
Severance Costs			700
Corporate Segment [Member]
Severance Costs			$ 300
North America [Member]
Workforce Reduction, Number of Employees			436
Percentage of Workforce Reduction			34.00%
Cost of Sales [Member]
Severance Costs			$ 5,700
Selling, General and Administrative Expenses [Member]
Severance Costs			2,500
Employee Severance [Member]
Accrued Severance	3,300		3,300
Scenario, Forecast [Member]
Severance Costs		$ 700
Discontinued Operations [Member]
Payments to Acquire Property, Plant, and Equipment				$ 1,000	$ 1,700
Impairments and Other Charges	78,300		78,345
Asset Write Downs and Litigation Settlement	80,500		80,500
Litigation Settlement, Amount	$ 5,000		$ 5,000
Number of Reportable Segments			2
Number of Grinding Facilities	4		4
Severance Costs			$ 8,200
Asset Impairment Charges			75,508		$ 176
Disposal Group, Including Discontinued Operation, Depreciation and Amortization				$ 900	4,400
Payments to Acquire Property, Plant, and Equipment			$ 69,404	$ 106,973	$ 67,929