Income Taxes - Components of Loss before (Benefit from) Provision for Income Taxes (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Domestic	$ (139,337)	$ (31,038)	$ (7,470)
Foreign	0	0	0
Loss before (benefit from) provision for income taxes	$ (139,337)	$ (31,038)	$ (7,470)