Note 8 - Prepaid Expenses and Other Current Assets (Tables)
12 Months Ended
Dec. 31, 2013
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]  
Schedule of Other Current Assets [Table Text Block]
    2013     2012  
    (in thousands)  

Prepaid insurance

  $ 2,422     $ 2,554  

Selling expenses

    869       436  

Fair market value of energy swaps, current portion

    275       134  

Whey process filters

    38       —  

Leases

    53       118  

Other prepaids and expenses

    258       188  

Total prepaid expenses and other current assets

  $ 3,915     $ 3,430