Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands	Jul. 31, 2019	Apr. 30, 2019	Jul. 31, 2018
Current, Principal Balance	$ 445,461	$ 435,603	$ 408,354
Current, Percent of Portfolio	79.39%	80.17%	78.40%
3 - 29 days past due, Principal Balance	$ 94,254	$ 91,747	$ 94,042
3 - 29 days past due, Percent of Portfolio	16.80%	16.89%	18.06%
30 - 60 days past due, Principal Balance	$ 15,891	$ 11,362	$ 14,377
30 - 60 days past due, Percent of Portfolio	2.83%	2.09%	2.76%
61 - 90 days past due, Principal Balance	$ 3,533	$ 3,429	$ 2,493
61 - 90 days past due, Percent of Portfolio	0.63%	0.63%	0.48%
> 90 days past due, Principal Balance	$ 1,965	$ 1,187	$ 1,554
> 90 days past due, Percent of Portfolio	0.35%	0.22%	0.30%
Total, Principal Balance	$ 561,104	$ 543,328	$ 520,820
Total, Percent of Portfolio	100.00%	100.00%	100.00%