Short-Term Investments - Schedule of Short-Term Investments (Details) - USD ($) $ in Thousands	Jun. 30, 2021	Jun. 30, 2020
Schedule Of Available For Sale Securities [Line Items]
Short-term investments, Amortized cost	$ 655,232	$ 123,395
Short-term investments, Gross unrealized gains	143	590
Short-term investments, Gross unrealized losses	(61)	(11)
Short-term investments	655,314	123,974
Corporate Bonds
Schedule Of Available For Sale Securities [Line Items]
Short-term investments, Amortized cost	466,403	70,781
Short-term investments, Gross unrealized gains	111	360
Short-term investments, Gross unrealized losses	(55)	(10)
Short-term investments	466,459	71,131
U.S. Treasury Securities
Schedule Of Available For Sale Securities [Line Items]
Short-term investments, Amortized cost	155,663	28,281
Short-term investments, Gross unrealized gains	16	88
Short-term investments, Gross unrealized losses	(5)	(1)
Short-term investments	155,674	28,368
Asset-Backed Securities
Schedule Of Available For Sale Securities [Line Items]
Short-term investments, Amortized cost	26,391	24,333
Short-term investments, Gross unrealized gains	16	142
Short-term investments, Gross unrealized losses	(1)	0
Short-term investments	26,406	$ 24,475
Certificates of Deposit
Schedule Of Available For Sale Securities [Line Items]
Short-term investments, Amortized cost	6,775
Short-term investments, Gross unrealized gains	0
Short-term investments, Gross unrealized losses	0
Short-term investments	$ 6,775