Note C - Finance Receivables, Net (Details) - Credit Quality Information for Finance Receivables (USD $) In Thousands, unless otherwise specified	Apr. 30, 2014	Apr. 30, 2013
Credit Quality Information for Finance Receivables [Abstract]
Current	$ 300,478	$ 284,441
Current	79.21%	78.27%
3 - 29 days past due	62,108	60,477
3 - 29 days past due	16.38%	16.64%
30 - 60 days past due	10,926	10,232
30 - 60 days past due	2.88%	2.82%
61 - 90 days past due	4,665	6,280
61 - 90 days past due	1.23%	1.73%
> 90 days past due	1,155	1,964
> 90 days past due	0.30%	0.54%
Total	$ 379,332	$ 363,394
Total	100.00%	100.00%