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3. Note Payable (Details Narrative) - USD ($)
$ in Thousands
10 Months Ended 12 Months Ended
Mar. 12, 2021
Apr. 30, 2021
Apr. 30, 2020
Apr. 17, 2020
Apr. 30, 2019
Proceeds from convertible notes   $ 138,464 $ 0   $ 0
Payment of capped calls   $ 12,837 $ 0   0
Reduction in additional paid-in-capital         $ 2,739
Promissory note [Member]          
Proceeds from loan       $ 4,400  
Maturity date       Apr. 21, 2022  
Convertible Senior Notes [Member]          
Debt face amount $ 143,800        
Proceeds from convertible notes $ 138,500        
Effective discount rate 8.78%        
Debt issuance costs $ 5,300        
Maturity date Mar. 15, 2026        
Interest rate 1.25%        
Payment of capped calls $ 12,800        
Reduction in additional paid-in-capital (12,800)        
Convertible Senior Notes [Member] | Initial Purchasers Full Exercise [Member]          
Debt face amount 18,800        
Convertible Senior Notes [Member] | Debt Component [Member]          
Debt face amount $ 99,700        
Effective discount rate 8.78%        
Debt issuance costs $ 3,700        
Convertible Senior Notes [Member] | Equity Component [Member]          
Debt face amount 44,100        
Debt issuance costs $ 1,600