XML 64 R52.htm IDEA: XBRL DOCUMENT
v3.25.3

Note 7 - Investments in Privately-Held Raw Material Companies - Summary of Investments (Details) - USD ($) $ in Thousands | Sep. 30, 2025 | Dec. 31, 2024 | May 31, 2023 | Apr. 30, 2023 | Jul. 31, 2022 | Apr. 30, 2022 | May 31, 2021 | Feb. 28, 2021 | Dec. 31, 2020
--- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Fair Value Investment Balance |  | $ 702 |  | $ 551 |  |  |  |  |  |  |
Equity Method Investment Balance |  | 14,619 |  | 14,066 |  |  |  |  |  |  |
Beijing Jiya [Member] |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment Balance |  | $ 4,305 |  | 4,867 |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 39.00% |  |  |  |  |  |  |  |  |
Xiaoyi Xingan Gallium [Member] |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment Balance |  | $ 5,666 |  | 5,304 |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage | [1] | 25.00% |  |  |  |  |  |  |  |  |
Chaoyang Kaimei Quartz Co [Member] |  |  |  |  |  |  |  |  |  |  |
Equity Method Investment Balance |  | $ 4,648 |  | 3,895 |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 40.00% | [2] |  |  |  |  | 40.00% |  |  |
Jia Mei Investment [Member] |  |  |  |  |  |  |  |  |  |  |
Fair Value Investment Balance |  | $ 702 |  | 551 |  |  |  |  |  |  |
Equity Method Investment, Ownership Percentage |  | 7.00% |  |  |  | 25.00% |  |  |  |  |
Nanjing Jin Mei Gallium [Member] |  |  |  |  |  |  |  |  |  |  |
Emeishan Jia Mei High Purity Metals Co., Ltd. |  |  |  |  |  |  |  |  |  |  | 8.50%
Beijing Bouy Vessel [Member] |  |  |  |  |  |  |  |  |  |  |
Emeishan Jia Mei High Purity Metals Co., Ltd. |  |  |  |  |  |  |  |  |  |  | 33.00%
Chao Yang ShouMei [Member] |  |  |  |  |  |  |  |  |  |  |
Joint Venture Investment, Ownership Percentage |  |  |  |  |  |  |  | 75.00% |  |  |
ChaoYang XinMei [Member] |  |  |  |  |  |  |  |  |  |  |
Joint Venture Investment, Ownership Percentage |  |  |  |  |  |  | 58.50% |  | 58.50% | 58.50% |
Jia Mei Investment [Member] |  |  |  |  |  |  |  |  |  |  |
Emeishan Jia Mei High Purity Metals Co., Ltd. |  | 7.10% | [3] |  | 10.00% |  |  |  |  |  |
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 Bouy Vessel [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 | [4] | 75.00% |  |  |  |  |  |  |  |  |
ChaoYang XinMei [Member] |  |  |  |  |  |  |  |  |  |  |
Joint Venture Investment Balance |  | $ 7,331 |  | 7,331 |  |  |  |  |  |  |
ChaoYang XinMei [Member] | ChaoYang XinMei [Member] |  |  |  |  |  |  |  |  |  |  |
Joint Venture Investment, Ownership Percentage | [5] | 58.50% |  |  |  |  |  |  |  |  |
Subsidiaries [Member] |  |  |  |  |  |  |  |  |  |  |
Fair Value Investment Balance |  | $ 14,211 |  | $ 14,211 |  |  |  |  |  |  |
[1] | In preparation for Tongmei’s application for a listing of shares in an IPO on the STAR Market, in late December 2020 we reorganized our entity structures in China. JinMei and BoYu and their subsidiaries, previously organized under AXT, Inc., were assigned to Tongmei and effectively merged with Tongmei although they retained their own respective legal entity status and are wholly owned subsidiaries of Tongmei. The 33% minority interest stakeholders of BoYu converted their ownership to a 7.59% minority interest in Tongmei. The 8.5% minority interest stakeholders, employees of JinMei, converted their ownership to a 0.38% minority interest in Tongmei. Further, a number of employees, key managers and contributors, purchased a 0.4% minority interest in Tongmei. In 2020, the Investors transferred approximately $48.1 million of new capital to Tongmei. An additional investment of approximately $1.5 million of new capital was funded in early January 2021. Under China regulations these investments must be formally approved by the appropriate government agency and are not deemed to be dilutive until such approval is granted. The government approved the approximately $49 million investment in its entirety on January 25, 2021 at which time the Investors owned a redeemable noncontrolling interest in Tongmei of 7.28%. As of June 30, 2025, 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 May 2023, we sold 15% of our equity investments in Jia Mei to a third party. We now own 10% of Jia Mei and account for it under the fair value method.
[4] | In April 2022, ChaoYang JinMei signed a joint venture agreement with certain investor to fund a new company, ChaoYang ShuoMei.
[5] | In February 2021, Tongmei signed a joint venture agreement with certain investors to fund ChaoYang XinMei.

X
- Definition The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 28 -Subparagraph (f) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482907/825-10-50-28 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 + Details
Name: | us-gaap_EquityMethodInvestmentOwnershipPercentage
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 270 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482964/270-10-50-1 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 32 -Subparagraph (ee) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-32 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147481664/323-10-45-1 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 323 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 3 -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481687/323-10-50-3 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(10)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Topic 280 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 25 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482810/280-10-50-25 + Details
Name: | us-gaap_EquityMethodInvestments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI), classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 825 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1A -Publisher FASB -URI https://asc.fasb.org/1943274/2147482736/825-10-45-1A + Details
Name: | us-gaap_EquitySecuritiesFVNINoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of investment in equity method investee and investment in and advance to affiliate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(18)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 + Details
Name: | us-gaap_InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The equity interest of noncontrolling shareholders, partners or other equity holders in consolidated entity. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition The parent entity's interest in net assets of the subsidiary, expressed as a percentage. + References No definition available. + Details
Name: | us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=axti_BeijingJiyaMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=axti_XiaoyiXinganGalliumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=axti_ChaoyangKaimeiQuartzCoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=axti_JiaMeiInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=axti_NanjingJinMeiGalliumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=axti_BeijingBouyVesselMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=axti_ChaoYangShoumeiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=axti_ChaoyangXinmeiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=axti_JiaMeiInvestmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=axti_NanjingJinMeiGalliumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=axti_ChaoYangJinMeiGalliumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_OwnershipAxis=axti_ChaoYangJinMeiGalliumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=axti_BeijingBouyVesselMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=axti_ChaoYangShoumeiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=axti_ChaoyangXinmeiMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_ConsolidatedEntitiesAxis=srt_SubsidiariesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |