The amount of expense incurred related to a collaborative agreement.

No definition available.

Name:	mram_CollaborativeExpense
Namespace Prefix:	mram_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of the total obligation of an expense related to the collaborative agreement.

+ References

No definition available.

+ Details

Name:	mram_CollaborativeExpenseObligation
Namespace Prefix:	mram_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- 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

- 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

- 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

- Details

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

- Details

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

- Details

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

- Details

Name:	srt_CounterpartyNameAxis=mram_SilterraMalaysiaSdnBhdMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Significant Agreements (Details) - USD ($) $ in Thousands		1 Months Ended	37 Months Ended
Significant Agreements (Details) - USD ($) $ in Thousands	Oct. 17, 2014	Sep. 30, 2018	Sep. 30, 2021
Joint Development Agreement \| GlobalFoundries, Inc.
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
Collaborative Agreement \| Silterra
Joint development agreement
Non-recurring engineering cost obligation		$ 1,000
JCA costs			$ 600