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BALANCE SHEETS (Parenthetical) (USD $)
Mar. 31, 2015
Dec. 31, 2014
Balance Sheets    
Common stock, par value $ 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 12,223,000us-gaap_CommonStockSharesIssued 12,216,000us-gaap_CommonStockSharesIssued
Common stock, shares outstanding 12,198,000us-gaap_CommonStockSharesOutstanding 12,191,000us-gaap_CommonStockSharesOutstanding