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Comprehensive Loss	9 Months Ended
Comprehensive Loss	Jan. 31, 2012
Comprehensive Loss [Abstract]
Comprehensive Loss	NOTE C--COMPREHENSIVE LOSS The Company's comprehensive loss was $16.4 million and $21.4 million for the three months and nine months ended January 31, 2012, respectively, and $5.5 million and $15.7 million for the three months and nine months ended January 31, 2011, respectively. Comprehensive loss differs from net loss due to the changes in the Company's pension benefits liability. See Note J "Pension Benefits" for more information regarding the Company's pension costs.

The entire disclosure for comprehensive income. Includes, but is not limited to, the following: 1) the amount of income tax expense or benefit allocated to each component of other comprehensive income, including reclassification adjustments, 2) the reclassification adjustments for each classification of other comprehensive income and 3) the ending accumulated balances for each component of comprehensive income. Components of comprehensive income include: (1) foreign currency translation adjustments; (2) gains (losses) on foreign currency transactions that are designated as, and are effective as, economic hedges of a net investment in a foreign entity; (3) gains (losses) on intercompany foreign currency transactions that are of a long-term-investment nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements; (4) change in the market value of a futures contract that qualifies as a hedge of an asset reported at fair value; (5) unrealized holding gains (losses) on available-for-sale securities and that resulting from transfers of debt securities from the held-to-maturity category to the available-for-sale category; (6) a net loss recognized as an additional pension liability not yet recognized as net periodic pension cost; and (7) the net gain (loss) and net prior service cost or credit for pension plans and other postretirement benefit plans.

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