Quarterly report pursuant to Section 13 or 15(d)

Revenue (Narrative) (Details)

v3.19.1
Revenue (Narrative) (Details) - USD ($)
9 Months Ended
Jan. 31, 2019
Jan. 31, 2018
Apr. 30, 2018
Disaggregation of Revenue [Line Items]      
Deferred revenue $ 2,699,227   $ 1,814,136
Refunds due students $ 1,370,060   $ 815,841
Sales Revenue, Net [Member] | Non-US [Member]      
Disaggregation of Revenue [Line Items]      
Percentage of revenues from students outside the United States 1.70% 2.10%