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6. Asset Retirement Obligations (Tables)
12 Months Ended
Mar. 31, 2015
Asset Retirement Obligation Disclosure [Abstract]  
Rollforward of the asset retirement obligations

   2015  2014
Carrying amount of asset retirement obligations as of April 1  $961,577   $813,412 
Liabilities incurred   274,148    134,113 
Liabilities settled   (23,441)   (30,314)
Accretion expense   27,932    44,366 
Carrying amount of asset retirement obligations as of March 31   1,240,216    961,577 
Less: Current portion   10,000    35,000 
Non-Current asset retirement obligation  $1,230,216   $926,577