CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Income Statement [Abstract]
Revenue	$ 193,319	$ 158,830	$ 380,354	$ 310,381
Cost of goods sold	124,954	110,081	247,422	219,109
Gross profit	68,365	48,749	132,932	91,272
Operating expenses
Research and development	16,516	15,423	34,328	30,114
Selling, general and administrative	24,132	19,736	45,938	37,241
Total operating expenses	40,648	35,159	80,266	67,355
Operating income	27,717	13,590	52,666	23,917
Interest expense and other income (loss), net	(68)	(381)	(2,260)	(930)
Loss on changes of equity interest in the JV Company, net	(7,641)	0	(7,641)	0
Net income before income taxes	419,101	13,209	441,858	22,987
Income tax expense	34,096	669	35,416	1,680
Net income	385,005	12,540	406,442	21,307
Net gain (loss) attributable to noncontrolling interest	2,007	(363)	20	(1,170)
Net income attributable to Alpha and Omega Semiconductor Limited	$ 382,998	$ 12,903	$ 406,422	$ 22,477
Net income per common share attributable to Alpha and Omega Semiconductor Limited
Basic (in dollars per share)	$ 14.40	$ 0.50	$ 15.35	$ 0.88
Diluted (in dollars per share)	$ 13.54	$ 0.47	$ 14.53	$ 0.84
Weighted average number of common shares attributable to Alpha and Omega Semiconductor Limited used to compute net income per share
Basic (in shares)	26,593	25,672	26,479	25,506
Diluted (in shares)	28,287	27,353	27,963	26,834
Gain on deconsolidation of the JV Company	$ 399,093	$ 0	$ 399,093	$ 0