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Asset Retirement Obligations | 12 Months Ended
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Mar. 31, 2013
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligations | 6. Asset Retirement Obligations Mexco’s asset retirement obligations relate to the plugging of wells, the removal of facilities and equipment, and site restoration on oil and gas properties. The fair value of a liability for an ARO is recorded in the period in which it is incurred, discounted to its present value using the credit adjusted risk-free interest rate, and a corresponding amount capitalized by increasing the carrying amount of the related long-lived asset. The liability is accreted each period, and the capitalized cost is depreciated over the useful life of the related asset. The following table provides a rollforward of the asset retirement obligations for fiscal years ended March 31:
| 2013 |  | 2012
Carrying amount of asset retirement obligations as of April 1 | $ 663,279 |  | $ 578,911
Liabilities incurred | 114,003 |  | 53,468
Liabilities settled | (3,246) |  | (5,351)
Accretion expense | 39,376 |  | 36,251
Carrying amount of asset retirement obligations as of March 31 | 813,412 |  | 663,279
Less: Current portion | 50,000 |  | 50,000
Non-Current asset retirement obligation | $ 763,412 |  | $ 613,279
The ARO is included on the consolidated balance sheets with the current portion being included in the accounts payable and accrued expenses.

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- Definition The entire disclosure for an asset retirement obligation and the associated long-lived asset. An asset retirement obligation is a legal obligation associated with the disposal or retirement from service of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7535-110849 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 410 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6392692&loc=d3e7569-110849 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 143 -Paragraph 22 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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