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7. Asset Retirement Obligation (Tables)
12 Months Ended
Dec. 31, 2015
Asset Retirement Obligation Disclosure [Abstract]  
Schedule of Asset Retirement Obligations
Asset Retirement Obligation      
   Balance December 31, 2013   $ 150,080  
   Accretion adjustment during 2014     (2,390 )
   Balance December 31, 2014     147,690  
   Accretion during 2015     5,137  
   Balance December 31, 2015   $ 152,827