Note 1 - Nature of Operations, Organization and Significant Accounting Policies - Schedule of Other Assets (Details) - USD ($) $ in Thousands	Apr. 30, 2018	Apr. 30, 2017
Kansas Expanded Lottery Act Management Contract Privilege Fee [Member]
Other assets intangible	$ 5,500	$ 5,500
Less amortized costs	2,679	2,256
Other assets net intangible, net	2,821	3,244
Gaming Equipment [Member]
Other assets intangible	5,426	5,012
Less amortized costs	4,574	3,782
Other assets net intangible, net	852	1,230
JET Autopilot Intellectual Property [Member]
Other assets intangible	1,417	1,417
Less amortized costs	960	866
Other assets net intangible, net	$ 457	$ 551