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Note C - Finance Receivables, Net (Details) - Financing receivables analysis	12 Months Ended
	Apr. 30, 2013	Apr. 30, 2012
Financing receivables analysis [Abstract]
Principal collected as a percent of average finance receivables	60.60%	65.60%
Average down-payment percentage	6.60%	7.00%
Average originating contract term (in months)	27 months 6 days	26 months 24 days
Portfolio weighted average contract term, including modifications (in months)	29 months 9 days	28 months 3 days