CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 33,735	$ 22,134	$ 65,085	$ 42,857
Cost of revenue	21,497	15,366	41,311	30,567
Gross profit	12,238	6,768	23,774	12,290
Operating expenses:
Selling, general and administrative	5,795	4,747	11,365	9,496
Research and development	2,537	1,543	4,942	2,950
Total operating expenses	8,332	6,290	16,307	12,446
Income (loss) from operations	3,906	478	7,467	(156)
Interest income (expense), net	39	(39)	(11)	(68)
Equity in income (loss) of unconsolidated joint ventures	1,502	(168)	2,613	(288)
Other income (expense), net	61	1,608	(50)	2,974
Income before provision for income taxes	5,508	1,879	10,019	2,462
Provision for income taxes	893	920	1,639	1,286
Net income	4,615	959	8,380	1,176
Less: Net income attributable to noncontrolling interests and redeemable noncontrolling interests	(230)	(598)	(570)	(993)
Net income attributable to AXT, Inc.	$ 4,385	$ 361	$ 7,810	$ 183
Net income attributable to AXT, Inc. per common share:
Basic	$ 0.11	$ 0.01	$ 0.19	$ 0.00
Diluted	$ 0.10	$ 0.01	$ 0.18	$ 0.00
Weighted-average number of common shares outstanding:
Basic	41,248	39,973	41,124	39,891
Diluted	42,727	40,750	42,725	40,543