CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)
Net income (loss)	$ 217	$ (1,023)
Other comprehensive income (loss), net of tax:
Change in foreign currency translation gain (loss), net of tax	(1,874)	2,474
Change in unrealized gain on available-for-sale debt investments, net of tax	1	57
Reclassification adjustment for gains included in net loss upon deconsolidation of a subsidiary		(617)
Total other comprehensive income (loss), net of tax	(1,873)	1,914
Comprehensive income (loss)	(1,656)	891
Less: Comprehensive income attributable to noncontrolling interests	(297)	(756)
Comprehensive income (loss) attributable to AXT, Inc.	$ (1,953)	$ 135