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Other Accrued Liabilities (Tables) | 12 Months Ended
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Apr. 30, 2014
Other Liabilities Disclosure [Abstract] |
Components of Other Accrued Liabilities | Other accrued liabilities, classified as current liabilities, as of April 30, 2014 and 2013 consist of the following:
|  | April 30, |
|  | 2014 |  |  | 2013 |
Maine Energy remediation reserve |  | $ | 2,932 |  |  | $ | 4,500 |
Other accrued liabilities |  |  | 14,680 |  |  |  | 16,514 |
Total other accrued liabilities |  | $ | 17,612 |  |  | $ | 21,014 |

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- Definition Tabular disclosure of the components of accrued liabilities. + References No definition available. + Details
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