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Quarterly report pursuant to Section 13 or 15(d)

Revenues - Narrative (Details)

v3.20.4
Revenues - Narrative (Details) - USD ($)
 3 Months Ended 9 Months Ended
Jan. 31, 2021
Jan. 31, 2020
Jan. 31, 2021
Jan. 31, 2020
Apr. 30, 2020
Disaggregation of Revenue [Line Items] Ìý Ìý Ìý Ìý Ìý
Deferred revenue $ 5,600,371 Ìý $ 5,600,371 Ìý $ 3,712,994
Due to students 2,243,690 Ìý $ 2,243,690 Ìý $ 2,371,844
Total revenue earned, deferred revenue $ 8,600,000 Ìý Ìý Ìý Ìý
Revenue Benchmark | Non-US Ìý Ìý Ìý Ìý Ìý
Disaggregation of Revenue [Line Items] Ìý Ìý Ìý Ìý Ìý
Percentage of revenues from students outside the United States 1.48% 1.90% 1.32% 1.90% Ìý