Income Taxes - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2019
Income Taxes [Line Items]
Change in valuation allowance	$ 22,300	$ 52,300	$ 3,700
Federal and state net operating loss carryforwards expiration year	2027
Research and development tax credit carryforwards expiration description	federal tax credits will expire at various dates beginning in 2028.
Unrecognized tax benefits related to federal and California R&D credits	$ 22,185	$ 5,787	$ 2,692
Federal Tax
Income Taxes [Line Items]
Net operating loss carryforwards	867,600
Research and development tax credit carryforwards	23,600
Federal Tax | Internal Revenue Service
Income Taxes [Line Items]
Net operating loss carryforwards	761,900
State Tax
Income Taxes [Line Items]
Net operating loss carryforwards	599,500
Research and development tax credit carryforwards	$ 15,800