Note 5 - Goodwill and Intangible Assets (Details Textual) - USD ($)	3 Months Ended			6 Months Ended	12 Months Ended
	Dec. 31, 2015	Jun. 30, 2015	Dec. 31, 2014	Jun. 30, 2015	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Trade Names [Member]
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill)		$ 8,000,000
Tubular And Pipe Products [Member]
Goodwill, Impairment Loss		16,451,000	$ 23,836,000	$ 16,500,000	$ 16,451,000	$ 23,836,000
Goodwill			16,451,000			16,451,000	$ 40,287,000
Specialty Metal Flat Products [Member]
Goodwill, Impairment Loss	$ 500,000				$ 500,000
Goodwill	500,000		500,000		500,000	500,000
Impairment of Intangible Assets, Finite-lived		$ 0
Finite-Lived Intangible Assets, Amortization Expense, Year Two	900,000				900,000
Finite-Lived Intangible Assets, Amortization Expense, Year Three	900,000				900,000
Finite-Lived Intangible Assets, Amortization Expense, Year Four	900,000				900,000
Finite-Lived Intangible Assets, Amortization Expense, Year Five	$ 900,000				900,000
Percentage of Decrease in Price of Hot Rolled Carbon Steel				22.00%
Amount Decrease Per Ton in Price of Hot Rolled Carbon Steel				$ 130
Goodwill, Impairment Loss					$ 16,951,000	23,836,000
Goodwill			$ 16,951,000			$ 16,951,000	$ 40,787,000
Finite-Lived Intangible Asset, Useful Life					15 years
Finite-Lived Intangible Assets, Remaining Amortization Period					15 years
Finite-Lived Intangible Assets, Amortization Expense, Next Twelve Months	$ 900,000				$ 900,000