Quarterly report pursuant to Section 13 or 15(d)

Revenues - Narrative (Details)

v3.20.4
Revenues - Narrative (Details) - USD ($)
3 Months Ended 6 Months Ended
Oct. 31, 2020
Oct. 31, 2020
Oct. 31, 2019
Apr. 30, 2020
Disaggregation of Revenue [Line Items]        
Deferred revenue $ 8,628,498 $ 8,628,498   $ 3,712,994
Due to students 2,070,225 2,070,225   $ 2,371,844
Total revenue earned, deferred revenue $ 4,800,000 $ 3,700,000    
Revenue Benchmark | Non-US        
Disaggregation of Revenue [Line Items]        
Percentage of revenues from students outside the United States   1.22% 1.32%