| USU Goodwill and Intangibles (Narrative) (Details) - USD ($) | 3 Months Ended | ||
|---|---|---|---|
| Jul. 31, 2019 | Jul. 31, 2018 | Apr. 30, 2019 | |
| Goodwill recognized | $ 5,011,432 | 听 | $ 5,011,432 | 
| Educacion Significativa, LLC [Member] | 听 | 听 | 听 | 
| Amortization of intangible assets | $ 275,000 | $ 275,000 | 听 | 
| X | ||||||||||
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef 
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| X | ||||||||||
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- Details 
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