Note C - Finance Receivables, Net - Credit Quality Information for Finance Receivables (Details) - USD ($) $ in Thousands	Oct. 31, 2022	Jul. 31, 2022	Apr. 30, 2022	Oct. 31, 2021	Jul. 31, 2021
Principle Balance	$ 1,259,649	$ 1,259,649	$ 1,101,497	$ 966,425	$ 966,425
Percent of Portfolio	100.00%	100.00%	100.00%	100.00%	100.00%
Financial Asset, Not Past Due [Member]
Principle Balance		$ 1,028,291	$ 958,808		$ 819,314
Percent of Portfolio		81.63%	87.05%		84.78%
Financial Asset, 3 to 29 Days Past Due [Member]
Principle Balance		$ 185,434	$ 109,873		$ 108,563
Percent of Portfolio		14.72%	9.97%		11.23%
Financial Asset, 30 to 59 Days Past Due [Member]
Principle Balance		$ 35,258	$ 22,477		$ 24,499
Percent of Portfolio		2.80%	2.04%		2.53%
Financial Asset, 60 to 89 Days Past Due [Member]
Principle Balance		$ 7,151	$ 7,360		$ 7,509
Percent of Portfolio		0.57%	0.67%		0.78%
Financial Asset, Equal to or Greater than 90 Days Past Due [Member]
Principle Balance		$ 3,515	$ 2,979		$ 6,540
Percent of Portfolio		0.28%	0.27%		0.68%