Annual report pursuant to Section 13 and 15(d)

Stockholders' equity - Schedule of equity awards (Detail)

v3.21.2
Stockholders' equity - Schedule of equity awards (Detail) - Employee stock option - $ / shares
12 Months Ended
Jun. 30, 2021
Jun. 30, 2020
Jun. 30, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock Options,Outstanding, beginning of period 70,154 86,462  
Stock Options, Granted 640,320    
Stock Options, Forfeited (8,410) (16,308)  
Stock Options, Outstanding, end of period 702,064 70,154 86,462
Stock Options, Exercisable, end of period 54,158 41,829  
Exercise price, beginning of period $ 60.42 $ 64.20  
Weighted-average Exercise Price, Granted 3.29    
Weighted-average Exercise Price, Forfeited 153.79 102.66  
Weighted-average Exercise Price, Exercise price, end of period 7.16 60.42 $ 64.20
Weighted-average Exercise Price, Exercisable, end of period $ 47.90 $ 69.81  
Weighted-average Remaining Contractual Term, Outstanding 8 years 25 days 2 years 10 months 20 days 3 years 6 months 29 days
Weighted-average Remaining Contractual Term, Exercisable 2 years 1 month 2 days 2 years 7 months 2 days