Note 7 - Impact to Consolidated Statements of Operations of Derivatives (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Interest Rate Swap [Member] | Chicago Tube and Iron Company Acquisition [Member]
Derivatives	$ (77)	$ (100)	$ (167)
Total loss	(77)	(100)	(167)
Interest Rate Swap [Member] | A B L Credit Facility [Member]
Derivatives	(365)	(472)	(309)
Total loss	(365)	(472)	$ (309)
Cash Flow Metals Hedges [Member]
Derivatives	(2,400)	(312)
Total loss	(2,400)	(312)
Metals Swap [Member]
Derivatives	(2,304)	934	$ (1,037)
Total loss	(2,304)	934	(1,037)
Embedded Customer Derivatives [Member]
Derivatives	2,304	(934)	1,037
Total loss	2,304	(934)	1,037
Derivatives	(2,842)	(884)	(476)
Total loss	$ (2,842)	$ (884)	$ (476)