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Consolidated Balance Sheets (Parentheticals) (USD $)
In Thousands, except Share data, unless otherwise specified
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Statement of Financial Position [Abstract]    
Receivables allowance for doubtful accounts (in Dollars) $ 12us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 18us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
Preferred stock, percentage non-cumulative 0.05%us-gaap_PreferredStockDividendRatePercentage 0.05%us-gaap_PreferredStockDividendRatePercentage
Preferred stock, par value (in Dollars per share) $ 10us-gaap_PreferredStockParOrStatedValuePerShare $ 10us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 1,000us-gaap_PreferredStockSharesAuthorized 1,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 437us-gaap_PreferredStockSharesIssued 437us-gaap_PreferredStockSharesIssued
Preferred stock, shares outstanding 437us-gaap_PreferredStockSharesOutstanding 437us-gaap_PreferredStockSharesOutstanding
Common stock, par value (in Dollars per share) $ 0us-gaap_CommonStockParOrStatedValuePerShare $ 0us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 40,000,000us-gaap_CommonStockSharesAuthorized 40,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 18,115,965us-gaap_CommonStockSharesIssued 18,115,965us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 17,674,559us-gaap_CommonStockSharesOutstanding 17,750,421us-gaap_CommonStockSharesOutstanding
Treasury stock, shares 441,406us-gaap_TreasuryStockShares 365,544us-gaap_TreasuryStockShares