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Note 9 - Income Taxes (Details Textual) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Tubular And Pipe Products [Member]
Goodwill, Impairment Loss				$ 16,500
Effective Income Tax Rate Reconciliation, Nondeductible Expense, Impairment Losses, Percent				25.30%
Income Tax Expense (Benefit)	$ 469	$ (438)	$ 3,438	$ (3,391)
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest	$ (1,288)	$ (1,036)	$ 4,464	$ (25,180)
Effective Income Tax Rate Reconciliation, Percent	(36.40%)	42.30%	77.00%	13.50%
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount			$ 800
Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Percent			18.30%

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- Definition

Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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