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CONDENSED BALANCE SHEETS (Parenthetical) (USD $)
Mar. 31, 2015
Dec. 31, 2014
CONDENSED BALANCE SHEETS    
Trade receivables, allowance (in dollars) $ 57,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent $ 49,000us-gaap_AllowanceForDoubtfulAccountsReceivableCurrent
INTANGIBLE ASSETS, accumulated amortization (in dollars) $ 205,361us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization $ 198,918us-gaap_FiniteLivedIntangibleAssetsAccumulatedAmortization
Preferred stock, par value (in dollars per share) $ 0.10us-gaap_PreferredStockParOrStatedValuePerShare $ 0.10us-gaap_PreferredStockParOrStatedValuePerShare
Preferred stock, shares authorized 250,000us-gaap_PreferredStockSharesAuthorized 250,000us-gaap_PreferredStockSharesAuthorized
Preferred stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Common stock, par value (in dollars per share) $ 0.10us-gaap_CommonStockParOrStatedValuePerShare $ 0.10us-gaap_CommonStockParOrStatedValuePerShare
Common stock, shares authorized 4,750,000us-gaap_CommonStockSharesAuthorized 4,750,000us-gaap_CommonStockSharesAuthorized
Common stock, shares issued 2,018,253us-gaap_CommonStockSharesIssued 2,018,253us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 2,018,253us-gaap_CommonStockSharesOutstanding 2,018,253us-gaap_CommonStockSharesOutstanding