Investments and fair value measurements - Summary of Investments on Condensed Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Jun. 30, 2023	Dec. 31, 2022
Current assets:
Marketable securities:	$ 476,936		$ 465,372
Strategic investments	10,311	$ 10,300	12,104
Level 1
Current assets:
Cash equivalents:			130,377
Strategic investments	0		0
Non-current liabilities:
Cash settled stock appreciation rights	0		0
Level 1 | U.S. government securities
Current assets:
Cash equivalents:			0
Marketable securities:	0		0
Level 1 | Money market funds
Current assets:
Cash equivalents:	266,692		130,377
Level 2
Current assets:
Cash equivalents:			48,900
Strategic investments	0		0
Non-current liabilities:
Cash settled stock appreciation rights	0		0
Level 2 | U.S. government securities
Current assets:
Cash equivalents:			48,900
Marketable securities:	171,372		151,687
Level 2 | Money market funds
Current assets:
Cash equivalents:	0		0
Level 3
Current assets:
Cash equivalents:			0
Strategic investments	10,311		12,104
Non-current liabilities:
Cash settled stock appreciation rights	48		462
Level 3 | U.S. government securities
Current assets:
Cash equivalents:			0
Marketable securities:	0		0
Level 3 | Money market funds
Current assets:
Cash equivalents:	$ 0		$ 0