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Net Income (Loss) Per Common Share Attributable to Alpha and Omega Semiconductor Limited - Basic and Diluted Income Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 12 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2022
Earnings Per Share [Abstract]      
Net income (loss) attributable to AOS $ (11,081) $ 12,364 $ 453,163
Basic:      
Weighted average number of common shares used to compute basic net income (loss) per share 28,236 27,552 26,764
Effect of potentially dilutive securities:      
Stock options, RSUs and ESPP shares 0 1,976 1,439
Weighted average number of common shares used to compute diluted net income (loss) per share 28,236 29,528 28,203
Net income (loss) per share attributable to common shareholders:      
Basic (in dollars per share) $ (0.39) $ 0.45 $ 16.93
Diluted (in dollars per share) $ (0.39) $ 0.42 $ 16.07