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Revenue - Contract Balances (Details) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2018 | Dec. 31, 2017
Revenue |  |
Contract liabilities | $ (1,061) | $ (924)
Amounts included in contract liabilities at the beginning of the period | $ 643 | $ 563

X
- Definition Amount of obligation to transfer good or service to customer for which consideration has been received or is receivable, classified as current. + References No definition available. + Details
Name: | axti_ContractWithCustomerLiabilityCurrent
Namespace Prefix: | axti_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due. + References No definition available. + Details
Name: | axti_ContractWithCustomerLiabilityRevenueRecognized
Namespace Prefix: | axti_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition n/a + References No definition available. + Details
Name: | axti_RevenueFromContractWithCustomerAbstract
Namespace Prefix: | axti_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration