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Note 5 - Restructuring (Details) - Summary of Restructuring Liabilities (USD $)
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Restructuring Cost and Reserve [Line Items]    
Ending balance $ 62,000  
Restructuring credits/charges (57,000) 52,000
October 2012 Plan [Member]
   
Restructuring Cost and Reserve [Line Items]    
Beginning balance 13,000 896,000
Ending balance 62,000 210,000
Restructuring credits/charges 57,000 50,000
Payments (8,000) (736,000)
October 2008 Plan [Member]
   
Restructuring Cost and Reserve [Line Items]    
Beginning balance   448,000
Ending balance   224,000
Restructuring credits/charges   (102,000)
Payments   $ (122,000)