Revenue (Narrative) (Details) - USD ($) |
9 Months Ended | ||
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Jan. 31, 2019 |
Jan. 31, 2018 |
Apr. 30, 2018 |
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| Disaggregation of Revenue [Line Items] | Ìý | Ìý | Ìý |
| Deferred revenue | $ 2,699,227 | Ìý | $ 1,814,136 |
| Refunds due students | $ 1,370,060 | Ìý | $ 815,841 |
| Sales Revenue, Net [Member] | Non-US [Member] | Ìý | Ìý | Ìý |
| Disaggregation of Revenue [Line Items] | Ìý | Ìý | Ìý |
| Percentage of revenues from students outside the United States | 1.70% | 2.10% | Ìý |
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- Definition 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://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition Current regulatory liabilities generally represent obligations to make refunds to customers for various reasons including overpayment. No definition available.
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. No definition available.
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