Revenue - Narrative (Details) - USD ($)	12 Months Ended
Apr. 30, 2022	Apr. 30, 2021
Disaggregation of Revenue [Line Items]
Deferred revenue	$ 5,889,911	$ 6,825,014
Total revenue earned, deferred revenue	$ 5,087,417
Revenue Benchmark \| Non-US \| Customer Concentration Risk
Disaggregation of Revenue [Line Items]
Percentage of revenues from students outside the united states (as a percent)	2.00%	1.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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+ References

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