Note 3 - Acquisition of Incon Processing, L.L.C. (Details) - Fair Values of the InCon Assets and Acquired Liabilities Assumed (USD $)
In Thousands, unless otherwise specified
 4 Months Ended 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
InCon [Member]
Dec. 31, 2013
InCon [Member]
Note 3 - Acquisition of Incon Processing, L.L.C. (Details) - Fair Values of the InCon Assets and Acquired Liabilities Assumed [Line Items]        
Working capital (a)       $ 593 [1]
Property, plant, and equipment, net       6,400
Identifiable intangible assets (b)       1,341 [2]
Total identifiable net assets       8,334
Goodwill 19,600 7,986   936
Total consideration, net of final working capital adjustment     $ 9,300 $ 9,270
[1] Includes cash and cash equivalents, accounts receivable, spare parts inventory and accounts payable.
[2] See Note 11 - Goodwill and other intangible assets for weighted average lives.