Note 1 - Nature of Operations, Organization and Significant Accounting Policies - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2022	Apr. 30, 2021
Kansas Expanded Lottery Act Management Contract Privilege Fee [Member]
Other assets intangible	$ 5,500	$ 5,500
Less amortized costs	4,372	3,949
Other assets net intangible, net	1,128	1,551
Gaming Equipment [Member]
Other assets intangible	6,151	5,927
Less amortized costs	5,868	5,696
Other assets net intangible, net	283	231
JET Autopilot Intellectual Property [Member]
Other assets intangible	1,417	1,417
Less amortized costs	1,335	1,241
Other assets net intangible, net	$ 82	$ 176