CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME (Unaudited) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME
Net income	$ 4,551	$ 1,798	$ 7,741	$ 2,223
Other comprehensive (loss) income, net of tax:
Change in foreign currency translation (loss) gain, net of tax	(5,018)	847	(2,202)	1,322
Change in unrealized gain (loss) on available-for-sale investments, net of tax	40	(2)	(77)	(125)
Total other comprehensive (loss) income, net of tax	(4,978)	845	(2,279)	1,197
Comprehensive (loss) income	(427)	2,643	5,462	3,420
Less: Comprehensive (income) loss attributable to noncontrolling interests	(346)	30	(921)	215
Comprehensive (loss) income attributable to AXT, Inc.	$ (773)	$ 2,673	$ 4,541	$ 3,635