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CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($)
shares in Thousands, $ in Thousands
 3 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Revenue $ 115,072 $ 104,858
Cost of goods sold 82,461 77,328
Gross profit 32,611 27,530
Operating expenses    
Research and development 11,384 8,325
Selling, general and administrative 20,352 14,615
Total operating expenses 31,736 22,940
Operating income 875 4,590
Interest income and other income (loss), net 262 40
Interest expense (1,490) (17)
Net income (loss) before income taxes (353) 4,613
Income tax expense 560 1,274
Net income (loss) including noncontrolling interest (913) 3,339
Net loss attributable to noncontrolling interest (3,329) (1,461)
Net income attributable to Alpha and Omega Semiconductor Limited $ 2,416 $ 4,800
Net income per common share attributable to Alpha and Omega Semiconductor Limited    
Basic (in dollars per share) $ 0.10 $ 0.20
Diluted (in dollars per share) $ 0.10 $ 0.19
Weighted average number of common shares attributable to Alpha and Omega Semiconductor Limited used to compute net income per share    
Basic (in shares) 23,844 24,021
Diluted (in shares) 24,594 24,960