Note 7 - Inventory (Details) - Classes of Inventory (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2013
Dec. 31, 2012
Inventory [Line Items]    
Unallocated inventory cost pool (including off-season costs) $ 6,655 $ 7,403
Other materials and supplies 8,880 9,821
Total inventory 94,339 66,659
Class, Fish Meal [Member]
   
Inventory [Line Items]    
Inventory Goods 30,119 26,511
Class, Fish Oil [Member]
   
Inventory [Line Items]    
Inventory Goods 41,081 17,352
Class, Fish Solubles [Member]
   
Inventory [Line Items]    
Inventory Goods 2,599 1,391
Class, Nutraceutical Products [Member]
   
Inventory [Line Items]    
Inventory Goods 3,650 4,181
Class, Dairy Protein Products [Member]
   
Inventory [Line Items]    
Inventory Goods $ 1,355