Quarterly report pursuant to Section 13 or 15(d)

Convertible Instruments - Long-term Convertible Note - April 23, 2021 Note (Detail)

v3.21.2
Convertible Instruments - Long-term Convertible Note - April 23, 2021 Note (Detail) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
3 Months Ended
Apr. 23, 2021
Aug. 31, 2021
Aug. 31, 2020
May 31, 2021
Debt Instrument [Line Items]        
Net Proceeds     $ 25,000  
Accrued interest on convertible notes   $ 2,244   $ 2,007
Interest on convertible notes   1,686 $ 566  
Long-term Convertible Note - April 23, 2021 Note        
Debt Instrument [Line Items]        
Debt instrument term 2 years      
Convertible note, aggregate principal $ 28,500      
Net Proceeds 25,000      
Unamortized discount 3,400      
Debt issuance costs $ 100      
Convertible notes, interest rate 10.00%      
Percentage increase in amount payable on default 15.00%      
Percentage increase in amount payable, second scenario 10.00%      
Percentage increase in amount payable, third default scenario 5.00%      
Conversion price per share $ 10.00      
Number of days of notice to be given for conversion of notes into common stock 5 days      
Shares reserved 6.0      
Debt instrument lock in period 6 months      
Number of days of notice to be given for redemption 3 days      
Threshold trading days to satisfy redemption obligation 3 days      
Debt instrument prepayment percentage premium 15.00%      
Number of days of notice to be given for prepayment 15 days      
Debt proceeds requiring investor consent $ 75,000      
Additional debt, increase in interest rate 5.00%      
Amortization of issuance discount and costs   441    
Unamortized discount and issuance costs   2,900    
Accrued interest on convertible notes   1,000    
Interest on convertible notes   745    
Net carrying value of note   $ 29,500    
Maximum | Long-term Convertible Note - April 23, 2021 Note        
Debt Instrument [Line Items]        
Conversion of principal and interest of convertible notes to common stock $ 7,000      
Threshold percentage of default interest rate 22.00%