Note 1 - Nature of Operations, Organization and Significant Accounting Policies - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2020	Apr. 30, 2019
Kansas Expanded Lottery Act Management Contract Privilege Fee [Member]
Other assets intangible	$ 5,500	$ 5,500
Less amortized costs	3,526	3,103
Other assets net intangible, net	1,974	2,397
Gaming Equipment [Member]
Other assets intangible	5,868	5,646
Less amortized costs	5,480	5,214
Other assets net intangible, net	388	432
JET Autopilot Intellectual Property [Member]
Other assets intangible	1,417	1,417
Less amortized costs	1,147	1,053
Other assets net intangible, net	$ 270	$ 364