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Note 3 - Accounts Receivable (Detail) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Allowance for Doubtful Accounts Receivable, Current $ 2,781 $ 2,883  
Provision for Doubtful Accounts $ 322 $ 1,125 $ 3,031