Note H - Income Taxes (Details) - Deferred Tax Assets and Liabilities (USD $) In Thousands, unless otherwise specified	Apr. 30, 2015	Apr. 30, 2014
Deferred income tax liabilities related to:
Finance receivables	$ 25,388us-gaap_DeferredTaxLiabilitiesOther	$ 21,944us-gaap_DeferredTaxLiabilitiesOther
Property and equipment	839	1,386
Total	26,227us-gaap_DeferredIncomeTaxLiabilities	23,330us-gaap_DeferredIncomeTaxLiabilities
Deferred income tax assets related to:
Accrued liabilities	1,872	1,602
Inventory	196us-gaap_DeferredTaxAssetsInventory	173us-gaap_DeferredTaxAssetsInventory
Share based compensation	4,030	4,667
Deferred revenue	951	1,644
Total	7,049us-gaap_DeferredTaxAssetsGross	8,086us-gaap_DeferredTaxAssetsGross
Deferred income tax liabilities, net	$ 19,178us-gaap_DeferredTaxLiabilities	$ 15,244us-gaap_DeferredTaxLiabilities

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Amount of deferred tax liability attributable to taxable temporary differences.

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Amount before allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards.

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Amount of deferred tax liability attributable to taxable temporary differences net of deferred tax asset attributable to deductible temporary differences and carryforwards after valuation allowances.

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Amount of deferred tax liability attributable to taxable temporary differences not separately disclosed.

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Amount of deferred tax liability attributable to taxable temporary differences from property, plant, and equipment.

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