CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Income Statement [Abstract]
Revenue	$ 151,551	$ 117,802
Cost of goods sold	109,028	90,870
Gross profit	42,523	26,932
Operating expenses
Research and development	14,691	12,368
Selling, general and administrative	17,505	15,185
Total operating expenses	32,196	27,553
Operating income (loss)	10,327	(621)
Interest expense and other income (loss), net	(549)	(827)
Income (loss) before income taxes	9,778	(1,448)
Income tax expense	1,011	410
Net income (loss) including noncontrolling interest	8,767	(1,858)
Net loss attributable to noncontrolling interest	(807)	(2,867)
Net income attributable to Alpha and Omega Semiconductor Limited	$ 9,574	$ 1,009
Net income per common share attributable to Alpha and Omega Semiconductor Limited
Basic (in dollars per share)	$ 0.38	$ 0.04
Diluted (in dollars per share)	$ 0.36	$ 0.04
Weighted average number of common shares attributable to Alpha and Omega Semiconductor Limited used to compute net income per share
Basic (in shares)	25,340	24,538
Diluted (in shares)	26,314	25,130