Note 1 - Significant Accounting Policies Summary of Operations and Basis of Presentation (Details) - Changes Recorded, Net of Tax, in Accumulated Other Comprehensive Loss Resulting From the Energy Swap Agreements (USD $)
In Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Note 1 - Significant Accounting Policies Summary of Operations and Basis of Presentation (Details) - Changes Recorded, Net of Tax, in Accumulated Other Comprehensive Loss Resulting From the Energy Swap Agreements [Line Items]    
Balance as of $ 28 $ (420)
Amounts, net of tax, reclassified to unallocated inventory cost pool, 127 [1] (328) [1]
Net change associated with current period swap transactions, net of tax, 278 120
Balance as of 179 28
Energy Related Derivative [Member] | Swap [Member]
    
Note 1 - Significant Accounting Policies Summary of Operations and Basis of Presentation (Details) - Changes Recorded, Net of Tax, in Accumulated Other Comprehensive Loss Resulting From the Energy Swap Agreements [Line Items]    
Net change associated with current period swap transactions, net of tax, 278 120
Energy Related Derivative [Member]
    
Note 1 - Significant Accounting Policies Summary of Operations and Basis of Presentation (Details) - Changes Recorded, Net of Tax, in Accumulated Other Comprehensive Loss Resulting From the Energy Swap Agreements [Line Items]    
Balance as of 28 (420)
Amounts, net of tax, reclassified to unallocated inventory cost pool, (127) 328
Balance as of $ 179 $ 28
[1] This accumulated other comprehensive income component is reclassified to the unallocated inventory cost pool in the period when theenergy consumption takes place.