Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands	Jul. 31, 2023	Apr. 30, 2023	Jul. 31, 2022
Principle Balance	$ 1,440,707	$ 1,373,372	$ 1,185,276
Percent of Portfolio	100.00%	100.00%	100.00%
Financial Asset, Not Past Due [Member]
Principle Balance	$ 1,151,275	$ 1,166,860	$ 990,391
Percent of Portfolio		84.96%	83.56%
Financial Asset, Past Due [Member]
Percent of Portfolio	79.91%
Financial Asset, 3 to 29 Days Past Due [Member]
Principle Balance	$ 226,600	$ 156,943	$ 151,953
Percent of Portfolio	15.73%	11.43%	12.82%
Financial Asset, 30 to 59 Days Past Due [Member]
Principle Balance	$ 48,650	$ 37,214	$ 33,576
Percent of Portfolio	3.38%	2.71%	2.83%
Financial Asset, 60 to 89 Days Past Due [Member]
Principle Balance	$ 9,294	$ 8,407	$ 6,675
Percent of Portfolio	0.65%	0.61%	0.56%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Principle Balance	$ 4,888	$ 3,948	$ 2,681
Percent of Portfolio	0.34%	0.29%	0.23%