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Related Party Transaction - Additional Information (Detail) (USD $)
12 Months Ended 254 Months Ended 16 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2013
Dec. 31, 2013
Robert Gipson [Member]
Related Party Transaction [Line Items]        
Purchase of stock $ 725,000 $ 510,000 $ 59,720,000 $ 500,000