v3.22.2.2
Share-Based Compensation - Additional Information (Detail)
$ / shares in Units, $ in Millions
12 Months Ended
Jun. 30, 2022
USD ($)
$ / shares
shares
Jun. 30, 2021
USD ($)
shares
Jun. 30, 2020
USD ($)
May 31, 2021
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unrecognized compensation expense related to unvested stock options | $ $ 6.6      
Expected weighted average period for recognition of compensation expense 1 year 8 months 12 days      
Options outstanding 19,934,007,000 16,668,542,000    
Employee Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Closing price of common stock | $ / shares $ 0.61      
Total fair value of options vested | $ $ 9.0 $ 6.4 $ 5.4  
Options outstanding 19,934,007      
Employee Stock Option | Directors        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation arrangement by share-based payment award, award vesting period 12 months      
Share-based compensation arrangement by share-based payment award, expiration period 10 years      
Employee Stock Option | Employees        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Stock option vested percentage 25.00%      
Share-based compensation arrangement by share-based payment award, award vesting period 36 months      
Share-based compensation arrangement by share-based payment award, expiration period 10 years      
Restricted Stock Units (RSUs)        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of common stock to be received for each RSUs 1      
Number Of Shares For Each Unit Of Restricted Stock 1.25      
2008 Omnibus Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock authorized   29,014,794,000    
Shares available for future grant 9,154,665,000      
2008 Omnibus Plan | Employee Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding 17,577,007      
Inducement Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Common stock authorized       2,500,000,000
Shares available for future grant 143,000,000      
Inducement Plan [Member] | Employee Stock Option        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Options outstanding 2,357,000