v3.22.4
Summary of Stock Option Activity (Detail)
 6 Months Ended
Dec. 31, 2022
USD ($)
$ / shares
shares
Number of Options  
Beginning Balance | shares 19,934,007
Granted | shares 9,220,410
Expired | shares (156,667,000)
Forfeited / Cancelled | shares (3,592,890)
Ending balance | shares 25,404,860
Vested and exercisable at end of period | shares 12,242,063
Weighted- Average Exercise Price  
Beginning Balance | $ / shares $ 2.85
Granted | $ / shares 0.53
Expired | $ / shares 2.63
Forfeited / Cancelled | $ / shares 2.05
Ending balance | $ / shares 2.12
Vested and exercisable at end of period | $ / shares $ 2.89
Weighted Average Remaining Contractual Term (in years)  
Outstanding at end of period 7 years 8 months 12 days
Vested and exercisable at end of period 6 years 3 months 18 days
Aggregate Intrinsic Value  
Outstanding at end of period | $ $ 0
Vested and exercisable at end of period | $ $ 0