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CONSOLIDATED BALANCE SHEETS (Parentheticals) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Statement Of Financial Position [Abstract]    
Common stock, par value (in dollars per share) $ 0.20us-gaap_CommonStockParOrStatedValuePerShare [1] $ 0.20us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 4,000,000us-gaap_CommonStockSharesAuthorized [1] 4,000,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 2,614,506us-gaap_CommonStockSharesIssued [1] 2,614,506us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 2,261,356us-gaap_CommonStockSharesOutstanding [1] 2,278,791us-gaap_CommonStockSharesOutstanding
Treasury stock, shares 176,297us-gaap_TreasuryStockShares [1] 158,862us-gaap_TreasuryStockShares
[1] Unaudited