Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Principle Balance	$ 1,101,497	$ 809,537
Percent of Portfolio	100.00%	100.00%
Financial Asset, Not Past Due [Member]
Principle Balance	$ 958,808	$ 717,520
Percent of Portfolio	87.05%	88.64%
Financial Asset, 3 to 29 Days Past Due [Member]
Principle Balance	$ 109,873	$ 71,269
Percent of Portfolio	9.97%	8.80%
Financial Asset, 30 to 59 Days Past Due [Member]
Principle Balance	$ 22,477	$ 13,058
Percent of Portfolio	2.04%	1.61%
Financial Asset, 60 to 89 Days Past Due [Member]
Principle Balance	$ 7,360	$ 5,551
Percent of Portfolio	0.67%	0.69%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Principle Balance	$ 2,979	$ 2,139
Percent of Portfolio	0.27%	0.26%