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Note L - Commitments and Contingencies (Details) (USD $) | 12 Months Ended
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Apr. 30, 2014 | Apr. 30, 2013 | Apr. 30, 2012
Note L - Commitments and Contingencies (Details) [Line Items] |  |  |
Operating Leases, Future Minimum Payments Due | $ 39,154,000 |  |
Operating Leases, Rent Expense | 5,200,000 | 4,700,000 | 4,200,000
Non-Cancelable [Member] |  |  |
Note L - Commitments and Contingencies (Details) [Line Items] |  |  |
Operating Leases, Future Minimum Payments Due | 7,200,000 |  |
Reasonably Assured [Member] |  |  |
Note L - Commitments and Contingencies (Details) [Line Items] |  |  |
Operating Leases, Future Minimum Payments Due | $ 32,000,000 |  |
Minimum [Member] |  |  |
Note L - Commitments and Contingencies (Details) [Line Items] |  |  |
Lessee Leasing Arrangements, Operating Leases, Term of Contract | 3 years |  |
Maximum [Member] |  |  |
Note L - Commitments and Contingencies (Details) [Line Items] |  |  |
Lessee Leasing Arrangements, Operating Leases, Term of Contract | 5 years |  |

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- Details
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- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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- Definition Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
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- Definition Amount of required minimum rental payments for leases having an initial or remaining non-cancelable letter-terms in excess of one year. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 10 -Section 55 -Paragraph 40 -Subparagraph (Note 3) -URI http://asc.fasb.org/extlink&oid=6584154&loc=d3e38371-112697 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41502-112717 + Details
Name: | us-gaap_OperatingLeasesFutureMinimumPaymentsDue
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