Significant Accounting Policies - Schedule of Property and Equipment Useful Lives (Details)	9 Months Ended
	Jan. 31, 2020
Call center equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Computer and office equipment
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	7 years
Library (online)
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	3 years
Software
Property, Plant and Equipment [Line Items]
Property, plant and equipment, useful life	5 years