Quarterly report pursuant to Section 13 or 15(d)

Significant Accounting Policies (Details)

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Significant Accounting Policies (Details)
3 Months Ended 6 Months Ended
Oct. 31, 2019
USD ($)
Oct. 31, 2018
USD ($)
Oct. 31, 2019
USD ($)
segment
shares
Oct. 31, 2018
USD ($)
shares
May 01, 2019
USD ($)
Apr. 30, 2019
USD ($)
Short-term Debt [Line Items]            
Cash, FDIC insured amount $ 250,000   $ 250,000      
Cash, uninsured amount 6,352,050   6,352,050     $ 9,359,208
Proceeds from bank debt     $ 71,932      
Percentage of payments from monthly payment plan     66.00%      
Withdrawal from course, percentage of financial aid earned     100.00%      
Long term accounts receivable 5,490,733   $ 5,490,733     $ 3,085,243
Right of use lease asset 7,953,283   7,953,283   $ 8,800,000  
Lease liabilities 7,953,283   7,953,283   $ 8,800,000  
Marketing and promotional costs 2,006,989 $ 2,248,611 $ 4,216,227 $ 4,436,067    
Antidilutive securities excluded from computation of earnings per share, amount | shares     3,021,131 3,435,616    
Number of reportable segments | segment     1      
Warrant            
Short-term Debt [Line Items]            
Antidilutive securities excluded from computation of earnings per share, amount | shares     566,223 650,847    
Unvested Restricted Stock            
Short-term Debt [Line Items]            
Antidilutive securities excluded from computation of earnings per share, amount | shares     69,672 0    
Convertible Debt            
Short-term Debt [Line Items]            
Antidilutive securities excluded from computation of earnings per share, amount | shares     4,167 4,167    
Convertible debt 50,000 $ 50,000 $ 50,000 $ 50,000    
Letter of Credit            
Short-term Debt [Line Items]            
Restricted cash 122,262   122,262      
Restricted cash, current $ 260,094   $ 260,094