Note 8 - Stockholders' Equity (Tables)

6 Months Ended

Jun. 30, 2025

Notes Tables

Schedule of Stockholders Equity [Table Text Block]

										Accumulated
					Additional					Other			AXT, Inc.						Total
	Preferred		Common		Paid-In		Accumulated			Comprehensive			Stockholders’			Noncontrolling			Stockholders’
	Stock		Stock		Capital		Deficit			Income (Loss)			Equity			Interests			Equity
Balance as of December 31, 2024	$	3,532	$	45	$	241,514	$	(43,664	)	$	(8,657	)	$	192,770		$	23,561		$	216,331
Stock-based compensation		—		—		563		—			—			563			—			563
Tongmei stock-based compensation		—		1		70		—			—			71			6			77
Net loss		—		—		—		(8,798	)		—			(8,798	)		(610	)		(9,408	)
Other comprehensive loss		—		—		—		—			431			431			53			484
Balance as of March 31, 2025		3,532		46		242,147		(52,462	)		(8,226	)		185,037			23,010			208,047
Stock-based compensation		—		—		607		—			—			607			—			607
Tongmei stock-based compensation		—		—		22		—			—			22			2			24
Net loss		—		—		—		(7,008	)		—			(7,008	)		(233	)		(7,241	)
Other comprehensive loss		—		—		—		—			1,056			1,056			128			1,184
Balance as of June 30, 2025	$	3,532	$	46	$	242,776	$	(59,470	)	$	(7,170	)	$	179,714		$	22,907		$	202,621

										Accumulated
					Additional					Other			AXT, Inc.						Total
	Preferred		Common		Paid-In		Accumulated			Comprehensive			Stockholders’			Noncontrolling			Stockholders’
	Stock		Stock		Capital		Deficit			Income (Loss)			Equity			Interests			Equity
Balance as of December 31, 2023	$	3,532	$	44	$	238,452	$	(32,040	)	$	(5,999	)	$	203,989		$	23,494		$	227,483
Common stock options exercised		—		—		20		—			—			20			—			20
Stock-based compensation		—		—		614		—			—			614			—			614
Tongmei stock-based compensation		—		—		171		—			—			171			13			184
Net loss		—		—		—		(2,083	)		—			(2,083	)		106			(1,977	)
Other comprehensive income		—		—		—		—			(1,627	)		(1,627	)		(187	)		(1,814	)
Balance as of March 31, 2024		3,532		44		239,257		(34,123	)		(7,626	)		201,084			23,426			224,510
Common stock options exercised		—		—		5		—			—			5			—			5
Stock-based compensation		—		—		621		—			—			621			—			621
Tongmei stock-based compensation		—		—		79		—			—			79			7			86
Net loss		—		—		—		(1,516	)		—			(1,516	)		316			(1,200	)
Other comprehensive income		—		—		—		—			(601	)		(601	)		(69	)		(670	)
Balance as of June 30, 2024	$	3,532	$	44	$	239,962	$	(35,639	)	$	(8,227	)	$	199,672		$	23,680		$	223,352