Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands	Jan. 31, 2019	Apr. 30, 2018	Jan. 31, 2018
Current, Principal Balance	$ 450,931	$ 424,511	$ 394,614
Current, Percent of Portfolio	83.05%	84.67%	79.30%
3 - 29 days past due, Principal Balance	$ 74,788	$ 59,544	$ 82,679
3 - 29 days past due, Percent of Portfolio	13.78%	11.87%	16.61%
30 - 60 days past due, Principal Balance	$ 12,062	$ 12,448	$ 14,918
30 - 60 days past due, Percent of Portfolio	2.22%	2.48%	3.00%
61 - 90 days past due, Principal Balance	$ 3,619	$ 3,331	$ 3,792
61 - 90 days past due, Percent of Portfolio	0.67%	0.66%	0.76%
> 90 days past due, Principal Balance	$ 1,493	$ 1,604	$ 1,649
> 90 days past due, Percent of Portfolio	0.28%	0.32%	0.33%
Total, Principal Balance	$ 542,893	$ 501,438	$ 497,652
Total, Percent of Portfolio	100.00%	100.00%	100.00%