Shareholders' Equity (Details) $ / shares in Units, $ in Millions	12 Months Ended		176 Months Ended
	Jun. 30, 2025 USD ($) votes $ / shares shares	Jun. 30, 2023 USD ($) $ / shares shares	Jun. 30, 2025 USD ($) votes $ / shares shares	Jun. 30, 2024 $ / shares shares
Common Shares
Common shares, authorized (in shares) | shares	100,000,000		100,000,000	100,000,000
Common shares, par value (in dollars per share)	$ 0.002		$ 0.002	$ 0.002
Number of votes per each common share | votes	1		1
Common stock, dividends declared per share	$ 0
Treasury Shares
Share repurchase program, authorized amount | $	$ 30.0		$ 30.0
Treasury stock acquired, shares repurchased (in shares) | shares		548,132	7,332,780
Repurchase of common shares under share repurchase program | $		$ 13.4
Treasury stock acquired less handling fees | $			$ 81.1
Treasury stock acquired, average price per share (in dollars per share)		$ 24.51	$ 11.01
Treasury stock retired (in shares) | shares			0
Treasury Stock Reissued
Treasury Shares
Treasury stock acquired, average price per share (in dollars per share)			$ 9.58
Treasury stock reissued (in shares) | shares			214,809
Treasury stock reissued average price per share			$ 3.89