Short-Term Investments - Additional Information (Details)	12 Months Ended
	Jun. 30, 2021 USD ($) InvestmentPosition	Jun. 30, 2020 USD ($)	Jun. 30, 2019 USD ($)
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	$ 655,232,000	$ 123,395,000
Short-term investments mature within one year	$ 495,800,000	$ 102,900,000
Percentage of short-term investments maturing within one year	76.00%	83.00%
Short-term investments mature thereafter	$ 159,500,000	$ 21,100,000
Percentage of short-term investments maturing thereafter	24.00%	17.00%
Number of investments in unrealized loss positions | InvestmentPosition	100
Short-term investments realized gains or losses	$ 0	$ 0	$ 0
Allowance for credit losses on investments that were in an unrealized loss position	$ 0
Minimum
Schedule Of Available For Sale Securities [Line Items]
Number of investment positions | InvestmentPosition	300
Accrued Interest Receivable
Schedule Of Available For Sale Securities [Line Items]
Amortized cost	$ 2,500,000	500,000
Fair value	$ 2,500,000	$ 500,000