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Balance Sheet (Unaudited) (Parenthetical) (USD $)
Dec. 31, 2014
Dec. 31, 2013
Stockholders' equity :    
Preferred Stock, par or stated value $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare $ 0.001us-gaap_PreferredStockParOrStatedValuePerShare
Preferred Stock, shares authorized 5,000,000us-gaap_PreferredStockSharesAuthorized 5,000,000us-gaap_PreferredStockSharesAuthorized
Preferred Stock, shares issued 0us-gaap_PreferredStockSharesIssued 0us-gaap_PreferredStockSharesIssued
Preferred Stock, shares outstanding 0us-gaap_PreferredStockSharesOutstanding 0us-gaap_PreferredStockSharesOutstanding
Common Stock, par or stated value $ 0.001us-gaap_CommonStockParOrStatedValuePerShare $ 0.001us-gaap_CommonStockParOrStatedValuePerShare
Common Stock, shares authorized 200,000,000us-gaap_CommonStockSharesAuthorized 200,000,000us-gaap_CommonStockSharesAuthorized
Common Stock, shares issued 38,512,516us-gaap_CommonStockSharesIssued 37,362,160us-gaap_CommonStockSharesIssued
Common Stock, shares outstanding 38,512,516us-gaap_CommonStockSharesOutstanding 37,362,160us-gaap_CommonStockSharesOutstanding