Other Assets (Details) $ in Thousands	9 Months Ended
	Jan. 31, 2017 USD ($)
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 1,746
Kansas Expanded Lottery Act Contract Privilege [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	5,500
Intangible Gaming Support Items [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	4,597
JET Autopilot Intellectual Property [Member]
Finite-Lived Intangible Assets [Line Items]
Other intangible assets	$ 1,417
Useful life	15 years