Net Loss Per Share Attributable To Common Stockholders - Summary of Potentially Dilutive Securities Excluded from Diluted Net Loss Per Share Calculation (Details) - shares shares in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities, potentially dilutive securities excluded from calculation of diluted net loss per share	10,160	62,588	52,862
Stock Options
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities, potentially dilutive securities excluded from calculation of diluted net loss per share	9,019	10,027	5,616
Restricted Stock Units
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities, potentially dilutive securities excluded from calculation of diluted net loss per share	1,141
Warrants to Purchase Common Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities, potentially dilutive securities excluded from calculation of diluted net loss per share		63
Convertible Redeemable Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities, potentially dilutive securities excluded from calculation of diluted net loss per share		52,435	47,131
Warrants to Purchase Redeemable Convertible Preferred Stock
Antidilutive Securities Excluded From Computation Of Earnings Per Share [Line Items]
Antidilutive securities, potentially dilutive securities excluded from calculation of diluted net loss per share		63	115