Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands	Apr. 30, 2017	Apr. 30, 2016
Principal Balance, Current	$ 397,341	$ 378,631
Current, Percent of Portfolio	85.12%	86.59%
3 - 29 days past due, Principal Balance	$ 52,869	$ 45,631
3 - 29 days past due, Percent of Portfolio	11.32%	10.43%
30 - 60 days past due, Principal Balance	$ 11,658	$ 8,429
30 - 60 days past due, Percent of Portfolio	2.50%	1.93%
61 - 90 days past due, Principal Balance	$ 3,516	$ 3,498
61 - 90 days past due, Percent of Portfolio	0.75%	0.80%
> 90 days past due	0.31%	0.25%
Financing Receivable, Recorded Investment Greater Than 90 Days Past Due	$ 1,470	$ 1,089
Total, Percent of Portfolio	100.00%	100.00%
Total, Principal Balance	$ 466,854	$ 437,278