Quarterly report pursuant to Section 13 or 15(d)

Revenue (Narrative) (Details)

v3.10.0.1
Revenue (Narrative) (Details) - USD ($)
3 Months Ended
Jul. 31, 2018
Jul. 31, 2017
Apr. 30, 2018
Disaggregation of Revenue [Line Items]      
Deferred revenue $ 2,244,151   $ 1,814,136
Refunds due students 1,118,450   $ 815,841
Deferred revenue recognized $ 1,800,000    
Sales Revenue, Net [Member] | Non-US [Member]      
Disaggregation of Revenue [Line Items]      
Percentage of revenues from students outside the United States 1.90% 3.00%