Annual report pursuant to Section 13 and 15(d)

Revenues - Narrative (Details)

v3.21.2
Revenues - Narrative (Details) - USD ($)
12 Months Ended
Apr. 30, 2021
Apr. 30, 2020
Disaggregation of Revenue [Line Items]    
Deferred revenue $ 6,825,014 $ 3,712,994
Due to students 2,747,484 2,371,844
Total revenue earned, deferred revenue $ 3,700,000 $ 2,500,000
Revenue Benchmark | Non-US | Customer Concentration Risk    
Disaggregation of Revenue [Line Items]    
Concentration risk (as a percent) 1.30% 2.50%