Note 15 - Segment Information (Details Textual)	3 Months Ended			6 Months Ended	12 Months Ended
	Dec. 31, 2015 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2014 USD ($)	Jun. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)		Dec. 31, 2014 USD ($)		Dec. 31, 2013 USD ($)
Carbon Flat Products and Specialty Metals Flat Products [Member]
Number of Reportable Segments					2
Tubular And Pipe Products [Member]
Goodwill and Intangible Asset Impairment					$ 24,451,000
Goodwill, Impairment Loss		$ 16,451,000	$ 23,836,000	$ 16,500,000	16,451,000		$ 23,836,000
Specialty Metal Flat Products [Member]
Goodwill, Impairment Loss	$ 500,000				$ 500,000
Number of Reportable Segments					3
Goodwill and Intangible Asset Impairment					$ 24,951,000	[1]	23,836,000	[1]	$ 0
Goodwill, Impairment Loss					$ 16,951,000		$ 23,836,000

[1] $24,451 of the goodwill and intangible asset impairment in 2015 related to the tubular and pipe products segment, $500 related to the specialty metals flat products segment. The goodwill impairment in 2014 related to the tubular and pipe products segment.