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Note 3 - Inventories (Details Textual) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Excess and Obsolete Inventory [Member]
Inventory Valuation Reserves	$ 27,100,000	$ 24,100,000
Lower of Costs or Net Realized Value Inventory [Member]
Inventory Valuation Reserves	$ 149,000	$ 73,000

X

- Definition

Amount of valuation reserve for inventory.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Topic 330
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 5.BB)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480581/330-10-S99-2

Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 210
-SubTopic 10
-Name Accounting Standards Codification
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(6))
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1

+ Details

Name:	us-gaap_InventoryValuationReserves
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=axti_ExcessAndObsoleteInventoryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_PublicUtilitiesInventoryAxis=axti_LowerOfCostsOrNetRealizedValueInventoryMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: