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Related Party Transactions - Additional Information (Detail) - USD ($)
Apr. 11, 2014
Oct. 01, 2013
Related Party Transaction [Line Items]    
Consulting agreement termination date   Mar. 30, 2014
Vice President [Member]    
Related Party Transaction [Line Items]    
Compensation   $ 37,400
Series D Preferred Stock [Member] | Split Rock [Member]    
Related Party Transaction [Line Items]    
Number of shares purchased 1,436,781  
Shares purchase price $ 1,436,781