Quarterly report pursuant to Section 13 or 15(d)

Revenue - Narrative (Details)

v3.23.1
Revenue - Narrative (Details) - USD ($)
3 Months Ended 9 Months Ended
Jan. 31, 2023
Jan. 31, 2022
Jan. 31, 2023
Jan. 31, 2022
Apr. 30, 2022
Disaggregation of Revenue [Line Items]          
Deferred revenue $ 8,075,063   $ 8,075,063   $ 5,889,911
Recognition of deferred revenue     5,122,057    
Long-term deferred revenue $ 0   $ 0    
Revenue Benchmark | Customer Concentration Risk | Pre-Licensure Nursing Program          
Disaggregation of Revenue [Line Items]          
Revenue (as percent) 19.00% 24.00% 22.00% 23.00%  
Revenue Benchmark | Customer Concentration Risk | Non-US          
Disaggregation of Revenue [Line Items]          
Revenue (as percent) 2.00% 2.00% 2.00% 2.00%