| Property and Equipment - Schedule of Software (Details) - USD ($) | Jul. 31, 2021 | Apr. 30, 2021 | 
|---|---|---|
| Property, Plant and Equipment [Line Items] | 听 | 听 | 
| Software | $ 599,243 | $ 467,572 | 
| Software | 听 | 听 | 
| Property, Plant and Equipment [Line Items] | 听 | 听 | 
| Software | 8,951,241 | 8,488,635 | 
| Accumulated amortization | (3,855,985) | (3,444,325) | 
| Total | $ 5,095,256 | $ 5,044,310 | 
| X | ||||||||||
| 
- 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 
 | 
| X | ||||||||||
| 
- 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 
 | 
| X | ||||||||||
| 
- 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 
 | 
| X | ||||||||||
| 
- 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. 
 | 
| X | ||||||||||
| 
- Details 
 |