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Note 12 - Commitments and Contingencies (Details Textual) Pure in Thousands, $ in Millions	3 Months Ended
	Sep. 30, 2025 USD ($)
Product Warranty Obligation, Term (Month)	12 months
Outstanding Purchase Orders	0
Cross License Agreement [Member]
License Agreement, Term (Year)	10 years
Land Purchase and Investment Agreement [Member]
Land Purchase and Investment Agreement, Total Value	$ 90
Kazuo AXT Investment [Member]
Land Purchase and Investment Agreement, Total Value	15
Kazuo Boyu Investment [Member]
Land Purchase and Investment Agreement, Total Value	$ 8

X

- Definition

Represents the total value of assets and capital invested into an agreement for a land purchase and investment agreement.

+ References

No definition available.

+ Details

Name:	axti_LandPurchaseAndInvestmentAgreementTotalValue
Namespace Prefix:	axti_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Represents the term of a license agreement.

+ References

No definition available.

+ Details

Name:	axti_LicenseAgreementTerm
Namespace Prefix:	axti_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of outstanding purchase orders as of a given date.

+ References

No definition available.

+ Details

Name:	axti_OutstandingPurchaseOrders
Namespace Prefix:	axti_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Term of warranty or group of similar warranties, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 460
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Subparagraph (a)(1)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147482425/460-10-50-4

+ Details

Name:	us-gaap_ProductWarrantyObligationTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=axti_CrossLicenseAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=axti_LandPurchaseAndInvestmentAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=axti_KazuoIAxtnvestmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_TypeOfArrangementAxis=axti_KazuoBoyuInvestmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: