CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS
Revenue	$ 27,120	$ 23,557	$ 51,539	$ 44,173
Cost of revenue	16,110	16,301	30,956	30,629
Gross profit	11,010	7,256	20,583	13,544
Operating expenses:
Selling, general and administrative	4,987	3,942	9,209	7,735
Research and development	1,500	1,019	2,920	2,143
Total operating expenses	6,487	4,961	12,129	9,878
Income from operations	4,523	2,295	8,454	3,666
Interest income, net	139	114	281	212
Equity in earnings (loss) of unconsolidated joint ventures	307	(188)	(27)	(1,121)
Other expense, net	(51)	(102)	(266)	(54)
Income before provision for income taxes	4,918	2,119	8,442	2,703
Provision for income taxes	367	321	701	480
Net income	4,551	1,798	7,741	2,223
Less: Net (income) loss attributable to noncontrolling interests	(650)	132	(965)	372
Net income attributable to AXT, Inc.	$ 3,901	$ 1,930	$ 6,776	$ 2,595
Net income attributable to AXT, Inc. per common share:
Basic (in dollars per share)	$ 0.10	$ 0.05	$ 0.17	$ 0.07
Diluted (in dollars per share)	$ 0.10	$ 0.05	$ 0.17	$ 0.07
Weighted-average number of common shares outstanding:
Basic (in shares)	39,001	38,306	38,970	36,238
Diluted (in shares)	40,216	39,706	40,289	37,645