Note 1 - Nature of Operations, Organization and Significant Accounting Policies - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2017	Apr. 30, 2016
Kansas Expanded Lottery Act Management Contract Privilege Fee [Member]
Other assets net intangible, net	$ 3,244	$ 3,667
Other assets intangible	5,500	5,500
Less amortized costs	2,256	1,833
Gaming Equipment [Member]
Other assets net intangible, net	1,230	1,602
Other assets intangible	5,012	4,576
Less amortized costs	3,782	2,974
JET Autopilot Intellectual Property [Member]
Other assets net intangible, net	551	645
Other assets intangible	1,417	1,417
Less amortized costs	$ 866	$ 772