Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands	Jan. 31, 2023	Apr. 30, 2022	Jan. 31, 2022
Principle Balance	$ 1,305,956	$ 1,101,497	$ 1,029,203
Percent of Portfolio	100.00%	100.00%	100.00%
Financial Asset, Not Past Due [Member]
Principle Balance	$ 1,011,877	$ 958,808	$ 841,635
Percent of Portfolio	77.48%	87.05%	81.78%
Financial Asset, 3 to 29 Days Past Due [Member]
Principle Balance	$ 245,939	$ 109,873	$ 146,609
Percent of Portfolio	18.83%	9.97%	14.24%
Financial Asset, 30 to 59 Days Past Due [Member]
Principle Balance	$ 36,447	$ 22,477	$ 29,062
Percent of Portfolio	2.79%	2.04%	2.81%
Financial Asset, 60 to 89 Days Past Due [Member]
Principle Balance	$ 7,700	$ 7,360	$ 6,682
Percent of Portfolio	0.59%	0.67%	0.65%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Principle Balance	$ 3,993	$ 2,979	$ 5,215
Percent of Portfolio	0.31%	0.27%	0.51%