Property and Equipment (Detail) - USD ($)	9 Months Ended
	Jan. 31, 2019	Apr. 30, 2018
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 9,536,322	$ 9,403,215
Less accumulated depreciation	(6,476,203)	(6,148,848)
Property and equipment, net	3,060,119	3,254,367
Building and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,661,367	1,653,534
Building and improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Service Life in Years	39 years
Building and improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Service Life in Years	15 years
Gaming equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 2,400,815	2,391,596
Gaming equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Service Life in Years	5 years
Gaming equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Service Life in Years	3 years
Furniture and office equipment
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 3,579,016	3,500,778
Furniture and office equipment | Maximum
Property, Plant and Equipment [Line Items]
Estimated Service Life in Years	7 years
Furniture and office equipment | Minimum
Property, Plant and Equipment [Line Items]
Estimated Service Life in Years	3 years
Land and improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 87,750	87,750
Leasehold improvements
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 1,718,835	1,711,641
Leasehold improvements | Maximum
Property, Plant and Equipment [Line Items]
Estimated Service Life in Years	20 years
Leasehold improvements | Minimum
Property, Plant and Equipment [Line Items]
Estimated Service Life in Years	7 years
Construction in progress
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Gross	$ 88,539	$ 57,916