CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 34,576	$ 25,469	$ 99,661	$ 68,326
Cost of revenue	23,075	16,646	64,386	47,213
Gross profit	11,501	8,823	35,275	21,113
Operating expenses:
Selling, general and administrative	6,476	4,623	17,841	14,119
Research and development	2,629	2,023	7,571	4,973
Total operating expenses	9,105	6,646	25,412	19,092
Income from operations	2,396	2,177	9,863	2,021
Interest expense, net	(44)	(70)	(55)	(138)
Equity in income (loss) of unconsolidated joint ventures	1,061	45	3,674	(243)
Other income (expense), net	948	(34)	898	2,940
Income before provision for (benefit from) income taxes	4,361	2,118	14,380	4,580
Provision for (benefit from) income taxes	(135)	637	1,504	1,923
Net income	4,496	1,481	12,876	2,657
Less: Net income attributable to noncontrolling interests and redeemable noncontrolling interests	(696)	(490)	(1,266)	(1,483)
Net income attributable to AXT, Inc.	$ 3,800	$ 991	$ 11,610	$ 1,174
Net income attributable to AXT, Inc. per common share:
Basic	$ 0.09	$ 0.02	$ 0.28	$ 0.03
Diluted	$ 0.09	$ 0.02	$ 0.27	$ 0.03
Weighted-average number of common shares outstanding:
Basic	41,460	40,152	41,237	39,978
Diluted	42,678	40,979	42,710	40,688