Quarterly report pursuant to Section 13 or 15(d)

Convertible Instruments - Long-term Convertible Note - November 2020 Note (Detail)

v3.21.2
Convertible Instruments - Long-term Convertible Note - November 2020 Note (Detail) - USD ($)
$ / shares in Units, $ in Thousands, shares in Millions
1 Months Ended 3 Months Ended
Nov. 10, 2020
Aug. 31, 2021
Jul. 31, 2021
Jun. 30, 2021
Aug. 31, 2021
Aug. 31, 2020
May 31, 2021
Debt Instrument [Line Items]              
Net Proceeds           $ 25,000  
Loss on extinguishment of convertible notes         $ (4,651)    
Accrued interest on convertible notes   $ 2,244     2,244   $ 2,007
Interest on convertible notes         1,686 $ 566  
Long-term Convertible Note - November 2020 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%            
Threshold percentage of default interest rate 22.00%            
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            
Loss on extinguishment of convertible notes         (4,700)    
Amortization of issuance discount and costs         98    
Interest on convertible notes         192    
Net carrying value of note   0     0    
June 2021 Partitioned Notes [Member]              
Debt Instrument [Line Items]              
Convertible note, aggregate principal       $ 6,000      
Shares issued on debt conversion       4.2      
Monthly redemption amount deferred       $ 1,500      
July 2021 Partitioned Notes [Member]              
Debt Instrument [Line Items]              
Convertible note, aggregate principal     $ 4,000        
Shares issued on debt conversion     3.3        
Monthly redemption amount deferred     $ 3,500        
August 2021 Partitioned Notes [Member]              
Debt Instrument [Line Items]              
Convertible note, aggregate principal   $ 4,900     $ 4,900    
Shares issued on debt conversion   4.4          
Monthly redemption amount deferred   $ 2,600