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Significant Agreements (Details) - Joint Development Agreement - GlobalFoundries, Inc. | Oct. 17, 2014
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Joint development agreement |
Period of possession of exclusive right to manufacture after qualification of device | 3 years
Period of possession of exclusive right to manufacture after completion of device development work | 4 years

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- Definition Represents the period during which the related party possess the exclusive right to manufacture the Company's discrete and embedded ST-MRAM devices developed pursuant to the agreement, after the completion of the relevant statement of work under which the device was developed. + References No definition available. + Details
Name: | mram_PeriodOfPossessionOfExclusiveRightToManufactureAfterCompletionOfDeviceDevelopmentWork
Namespace Prefix: | mram_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Represents the period during which the related party possess the exclusive right to manufacture the Company's discrete and embedded ST-MRAM devices developed pursuant to the agreement, after the qualification of the MRAM device for a particular technology node. + References No definition available. + Details
Name: | mram_PeriodOfPossessionOfExclusiveRightToManufactureAfterQualificationOfDevice
Namespace Prefix: | mram_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_TypeOfArrangementAxis=mram_JointDevelopmentAgreementMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_CounterpartyNameAxis=mram_GlobalfoundriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |