| USU Goodwill and Intangibles - Intangible Assets (Details) - Educacion Significativa, LLC - USD ($) | Jul. 31, 2020 | Apr. 30, 2020 | 
|---|---|---|
| Goodwill [Line Items] | 听 | 听 | 
| Intangible assets | $ 10,100,000 | $ 10,100,000 | 
| Accumulated amortization | (2,200,000) | (2,200,000) | 
| Total | $ 7,900,000 | $ 7,900,000 | 
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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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- Definition Amount after amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. Reference 1: http://www.xbrl.org/2003/role/disclosureRef 
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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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- Details 
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