Quarterly report pursuant to Section 13 or 15(d)

Revenues - Schedule of Disaggregated Revenue (Details)

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Revenues - Schedule of Disaggregated Revenue (Details) - USD ($)
 3 Months Ended 6 Months Ended
Oct. 31, 2020
Oct. 31, 2019
Oct. 31, 2020
Oct. 31, 2019
Disaggregation of Revenue [Line Items]        
Revenue $ 16,971,045 $ 12,085,965 $ 32,136,607 $ 22,443,947
Tuition        
Disaggregation of Revenue [Line Items]        
Revenue 14,979,083 10,807,131 28,341,990 20,098,083
Course fees        
Disaggregation of Revenue [Line Items]        
Revenue 1,782,022 1,119,259 3,386,057 2,045,213
Book fees        
Disaggregation of Revenue [Line Items]        
Revenue 46,037 20,631 85,175 41,416
Exam fees        
Disaggregation of Revenue [Line Items]        
Revenue 78,900 55,415 149,555 115,515
Service fees        
Disaggregation of Revenue [Line Items]        
Revenue $ 85,003 $ 83,529 $ 173,830 $ 143,720