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Investment in ARMA Energy . Inc - Additional Information (Detail) (Variable Interest Entity, Not Primary Beneficiary, Aggregated Disclosure [Member], Arma Energy, Inc. [Member], USD $)
0 Months Ended 0 Months Ended
Jun. 27, 2013
Jun. 26, 2014
Feb. 01, 2013
Feb. 01, 2013
Promissory Note [Member]
Feb. 01, 2013
Promissory Note [Member]
Variable Interest Entity [Line Items]          
Preferred stock received     71.00%    
Promissory note, Principal amount         $ 500,000
Promissory note, Maturity period       5 years  
Ownership stock sale percentage 58.00%        
Equity method investments   $ 0