Note 5 - Goodwill by Reportable Segment (Details) - USD ($)	3 Months Ended	6 Months Ended	12 Months Ended
	Dec. 31, 2014	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014
Flat Products [Member]
Balance as of December 31, 2013		$ 500,000	$ 500,000	$ 500,000
Acquisitions
Impairments			$ (500,000)
Balance as of December 31, 2014	$ 500,000			$ 500,000
Tubular And Pipe Products [Member]
Balance as of December 31, 2013		16,451,000	$ 16,451,000	$ 40,287,000
Acquisitions
Impairments	(23,836,000)	(16,500,000)	$ (16,451,000)	$ (23,836,000)
Balance as of December 31, 2014	16,451,000			16,451,000
Balance as of December 31, 2013		$ 16,951,000	$ 16,951,000	$ 40,787,000
Acquisitions
Impairments			$ (16,951,000)	$ (23,836,000)
Balance as of December 31, 2014	$ 16,951,000			$ 16,951,000