v3.26.1
Note 7 - Investments in Privately-Held Raw Material Companies - Summary of Investments (Details) - USD ($)
$ in Thousands
Jun. 30, 2026
Dec. 31, 2025
Equity Method Investment Balance $ 14,055 $ 14,968
Beijing Jiya [Member]    
Equity Method Investment Balance $ 4,508 4,428
Equity Method Investment, Ownership Percentage 39.00%  
Xiaoyi Xingan Gallium [Member]    
Equity Method Investment Balance $ 4,839 5,827
Equity Method Investment, Ownership Percentage [1] 25.00%  
Chaoyang Kaimei Quartz Co [Member]    
Equity Method Investment Balance $ 4,708 4,713
Equity Method Investment, Ownership Percentage [2] 40.00%  
Nanjing Jin Mei Gallium [Member]    
Joint Venture Investment Balance $ 592 592
Nanjing Jin Mei Gallium [Member] | Nanjing Jin Mei Gallium [Member]    
Joint Venture Investment, Ownership Percentage [1] 85.50%  
Chao Yang Jin Mei Gallium [Member]    
Joint Venture Investment Balance $ 1,820 1,820
Chao Yang Jin Mei Gallium [Member] | Chao Yang Jin Mei Gallium [Member]    
Joint Venture Investment, Ownership Percentage [1] 85.50%  
Beijing Boyu Semiconductor Vessel Craftwork Technology Co [Member]    
Joint Venture Investment Balance $ 1,346 1,346
Beijing Bouy Vessel [Member] | Beijing Bouy Vessel [Member]    
Joint Venture Investment, Ownership Percentage [1] 85.50%  
Chao Yang ShouMei [Member]    
Joint Venture Investment Balance $ 3,122 3,122
Chao Yang ShouMei [Member] | Chao Yang ShouMei [Member]    
Joint Venture Investment, Ownership Percentage [3] 75.00%  
ChaoYang XinMei [Member]    
Joint Venture Investment Balance $ 7,331 7,331
ChaoYang XinMei [Member] | ChaoYang XinMei [Member]    
Joint Venture Investment, Ownership Percentage [4] 58.50%  
Subsidiaries [Member]    
Fair Value Investment Balance $ 14,211 $ 14,211
[1] As of June 30, 2026, Tongmei’s noncontrolling interests and redeemable noncontrolling interests totaled approximately 14.5%. AXT remains the controlling stakeholder of Tongmei and holds a majority of the Board of Director positions of Tongmei.
[2] In April 2022, Tongmei signed a joint venture agreement with certain investors to fund a new company, ChaoYang KaiMei.
[3] In April 2022, ChaoYang JinMei signed a joint venture agreement with certain investor to fund a new company, ChaoYang ShuoMei.
[4] In February 2021, Tongmei signed a joint venture agreement with certain investors to fund ChaoYang XinMei.