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Consolidated Balance Sheets (Parentheticals) (USD $)
In Thousands, except Share data, unless otherwise specified
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Trade, allowance (in Dollars) $ 1,611us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 1,477us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 1,157us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 2,074us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Preferred stock par value (in Dollars per share) $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare $ 0.01us-gaap_PreferredStockParOrStatedValuePerShare    
Preferred stock, shares authorized 10,000,000us-gaap_PreferredStockSharesAuthorized 10,000,000us-gaap_PreferredStockSharesAuthorized    
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued    
Common stock, par value (in Dollars per share) $ 0.01us-gaap_CommonStockParOrStatedValuePerShare $ 0.01us-gaap_CommonStockParOrStatedValuePerShare    
Common stock, shares authorized 40,000,000us-gaap_CommonStockSharesAuthorized 40,000,000us-gaap_CommonStockSharesAuthorized    
Common stock, shares issued 11,474,096us-gaap_CommonStockSharesIssued 11,391,464us-gaap_CommonStockSharesIssued    
Common stock, shares outstanding 7,423,115us-gaap_CommonStockSharesOutstanding 7,983,539us-gaap_CommonStockSharesOutstanding    
Treasury stock, shares 4,050,981us-gaap_TreasuryStockShares 3,407,925us-gaap_TreasuryStockShares