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Note 1 - Nature of Operations, Organization and Significant Accounting Policies - Schedule of Other Assets (Details) - USD ($)
$ in Thousands
Apr. 30, 2019
Apr. 30, 2018
Kansas Expanded Lottery Act Management Contract Privilege Fee [Member]    
Other assets intangible $ 5,500 $ 5,500
Less amortized costs 3,103 2,679
Other assets net intangible, net 2,397 2,821
Gaming Equipment [Member]    
Other assets intangible 5,646 5,426
Less amortized costs 5,214 4,574
Other assets net intangible, net 432 852
JET Autopilot Intellectual Property [Member]    
Other assets intangible 1,417 1,417
Less amortized costs 1,053 960
Other assets net intangible, net $ 364 $ 457