Quarterly report pursuant to Section 13 or 15(d)

Leases - Narrative (Details)

v3.22.0.1
Leases - Narrative (Details)
3 Months Ended 9 Months Ended
Jan. 31, 2022
USD ($)
ft²
Jan. 31, 2021
USD ($)
Jan. 31, 2022
USD ($)
ft²
Jan. 31, 2021
USD ($)
Lessee, Lease, Description [Line Items]        
Amount of office and classroom space leased (in square feet) | ft² 191,328   191,328  
Lease extension term 5 years   5 years  
Total future minimum lease payments (as a percent) 96.00%   96.00%  
Incremental borrowing rate (as a percent) 12.00%   12.00%  
Amortization of tenant improvement allowances $ 177,259 $ 483,872 $ 0 $ 0
Lease expense 1,008,704 $ 717,664 2,861,876 $ 1,779,317
Leases not yet commenced, liability $ 3,700,000   $ 3,700,000  
Minimum        
Lessee, Lease, Description [Line Items]        
Lease term 6 years   6 years  
Maximum        
Lessee, Lease, Description [Line Items]        
Lease term 8 years   8 years