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Note 5 - Restructuring (Details) (USD $)
 3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Note 5 - Restructuring (Details) [Line Items]        
Restructuring Charges $ 57,000 $ (52,000)    
Restructuring Reserve 62,000      
Restructuring and Related Cost, Cost Incurred to Date 2,100,000      
Employee Severance [Member]
        
Note 5 - Restructuring (Details) [Line Items]        
Restructuring and Related Cost, Cost Incurred to Date 7,400,000      
Facility Closing [Member] | October 2008 Plan [Member]
        
Note 5 - Restructuring (Details) [Line Items]        
Restructuring and Related Cost, Cost Incurred to Date 2,700,000      
Facility Closing [Member]
        
Note 5 - Restructuring (Details) [Line Items]        
Restructuring and Related Cost, Cost Incurred to Date 4,700,000      
October 2012 Plan [Member]
        
Note 5 - Restructuring (Details) [Line Items]        
Restructuring Charges (57,000) (50,000)    
Restructuring Reserve 62,000 210,000 13,000 896,000
Restructuring and Related Cost, Cost Incurred to Date 2,200,000      
October 2008 Plan [Member]
        
Note 5 - Restructuring (Details) [Line Items]        
Restructuring Charges   102,000    
Restructuring Reserve   $ 224,000   $ 448,000