Accounts Receivable  | 
12 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Apr. 30, 2019  | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Receivables [Abstract] | Ìý | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Accounts Receivable | 
 Note 3. Accounts Receivable Accounts receivable consisted of the following at April 30, 2019 and 2018: 
 Bad debt expense for the years ended April 30, 2019 and 2018, were $854,008 and $535,366 respectively.  | 
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- Definition The entire disclosure for claims held for amounts due a entity, excluding financing receivables. Examples include, but are not limited to, trade accounts receivables, notes receivables, loans receivables. Includes disclosure for allowance for credit losses. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef 
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- References No definition available. 
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