Quarterly report pursuant to Section 13 or 15(d)

Leases - Narrative (Details)

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Leases - Narrative (Details)
3 Months Ended 9 Months Ended
Jan. 31, 2021
USD ($)
ft²
Jan. 31, 2021
USD ($)
ft²
Lessee, Lease, Description [Line Items]    
Amount of office and classroom space leased (in square feet) | ft² 142,968 142,968
Incremental borrowing rate (as a percent) 12.00% 12.00%
Lease expense $ 717,664 $ 1,779,317
Tampa, Florida    
Lessee, Lease, Description [Line Items]    
Leases not yet commenced, liability 5,200,000 5,200,000
Phoenix, Arizona    
Lessee, Lease, Description [Line Items]    
Leases not yet commenced, liability $ 3,900,000 $ 3,900,000