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Commitments and Contingencies (Tables) | 12 Months Ended
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Apr. 30, 2013
Schedule of Future Minimum Operating Lease and Finance Lease Obligation Payments | The following is a schedule of future minimum operating lease and finance lease obligation payments, together with the present value of the net minimum lease payments under finance lease obligations, as of April 30, 2013:
|  | Operating Leases |  |  | Financing Lease Obligations |
2014 |  | $ | 11,639 |  |  | $ | 472 |
2015 |  |  | 11,931 |  |  |  | 472 |
2016 |  |  | 10,246 |  |  |  | 1,098 |
2017 |  |  | 9,712 |  |  |  | - |
2018 |  |  | 11,294 |  |  |  | - |
Thereafter |  |  | 118,332 |  |  |  | - |
Total minimum lease payments |  | $ | 173,154 |  |  |  | 2,042 |
Less —amount representing interest |  |  |  |  |  |  | 225 |
|  |  |  |  |  |  | 1,817 |
Less —current maturities of finance lease obligations |  |  |  |  |  |  | 361 |
Present value of long term finance lease obligations |  |  |  |  |  | $ | 1,456 |
Schedule of Expected Payments for Succeeding Year | The payments we expect to make, in today’s dollars, for each of the five succeeding fiscal years and the aggregate amount thereafter are as follows:
2014 |  | $ | 225 |
2015 |  |  | 3,368 |
2016 |  |  | 661 |
2017 |  |  | 26 |
2018 |  |  | 42 |
Thereafter |  |  | 750 |
Total |  | $ | 5,072 |
Reconciliation of Expected Aggregate Undiscounted Amount to Amount Recognized in Statements of Financial Position | A reconciliation of the expected aggregate undiscounted amount to the amount recognized in the statements of financial position is as follows as of April 30, 2013:
Undiscounted liability |  | $ | 5,072 |
Plus inflation / discount |  |  | 225 |
Liability balance |  | $ | 5,297 |

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- Definition Tabular disclosure of future environmental remediation payments as of the latest balance sheet presented, in aggregate and for each of the five succeeding fiscal years and thereafter. + References No definition available. + Details
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- Definition Reconciliation of the environmental remediation liability to the undiscounted environmental remediation liability as of the latest balance sheet date. + References No definition available. + Details
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- Definition Tabular disclosure of future minimum lease payments as of the date of the latest balance sheet presented, in aggregate and for each of the five years succeeding fiscal years, with separate deductions from the total for the amount representing executor costs, including any profit thereon, included in the minimum lease payments and for the amount of the imputed interest necessary to reduce the net minimum lease payments to present value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6455398&loc=d3e45280-112737 + Details
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