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Note 3 - Accounts Receivable (Details) (USD $)
12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Receivables [Abstract]      
Allowance for Doubtful Accounts Receivable, Current $ 3,200,000 $ 2,800,000  
Provision for Doubtful Accounts $ 83,000 $ 322,000 $ 1,100,000