Note C - Finance Receivables, Net (Details) - Credit Quality Information for Finance Receivables (USD $) In Thousands, unless otherwise specified	Apr. 30, 2015	Apr. 30, 2014
Credit Quality Information for Finance Receivables [Abstract]
Current	$ 329,329	$ 300,478
Current	78.91%	79.21%
3 - 29 days past due	64,004	62,108
3 - 29 days past due	15.33%	16.38%
30 - 60 days past due	12,777	10,926
30 - 60 days past due	3.06%	2.88%
61 - 90 days past due	8,463	4,665
61 - 90 days past due	2.03%	1.23%
> 90 days past due	2,795	1,155
> 90 days past due	0.67%	0.30%
Total	$ 417,368	$ 379,332
Total	100.00%	100.00%