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Summary of Stock Option Activity (Detail)
6 Months Ended
Dec. 31, 2020
USD ($)
$ / shares
shares
Number of Options  
Beginning Balance | shares 11,252,976
Granted | shares 4,890,300
Exercised | shares (56,088)
Forfeited / Cancelled | shares (178,828)
Ending balance | shares 15,908,360
Vested and exercisable at end of period | shares 7,252,642
Weighted- Average Exercise Price  
Beginning Balance | $ / shares $ 2.81
Granted | $ / shares 3.38
Exercised | $ / shares 2.47
Forfeited / Cancelled | $ / shares 3.53
Ending balance | $ / shares 2.98
Vested and exercisable at end of period | $ / shares $ 2.71
Weighted Average Remaining Contractual Term (in years)  
Outstanding at end of period 8 years
Vested and exercisable at end of period 6 years 10 months 24 days
Aggregate Intrinsic Value  
Outstanding at end of period | $ $ 3,430,245
Vested and exercisable at end of period | $ $ 2,944,999