The amount of expense incurred related to a collaborative agreement.

No definition available.

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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

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Namespace Prefix:	mram_
Data Type:	xbrli:monetaryItemType
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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

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Namespace Prefix:	mram_
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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

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- Definition

The aggregate costs incurred (1) in a planned search or critical investigation aimed at discovery of new knowledge with the hope that such knowledge will be useful in developing a new product or service, a new process or technique, or in bringing about a significant improvement to an existing product or process; or (2) to translate research findings or other knowledge into a plan or design for a new product or process or for a significant improvement to an existing product or process whether intended for sale or the entity's use, during the reporting period charged to research and development projects, including the costs of developing computer software up to the point in time of achieving technological feasibility, and costs allocated in accounting for a business combination to in-process projects deemed to have no alternative future use.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 985
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6501960&loc=d3e128462-111756

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 730
-SubTopic 10
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6420194&loc=d3e21568-108373

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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Namespace Prefix:
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- Details

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- Details

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- Details

Name:	srt_CounterpartyNameAxis=mram_SilterraMalaysiaSdnBhdMember
Namespace Prefix:
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Significant Agreements (Details) - USD ($) $ in Thousands		1 Months Ended	3 Months Ended		9 Months Ended		25 Months Ended
Significant Agreements (Details) - USD ($) $ in Thousands	Oct. 17, 2014	Sep. 30, 2018	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020
Joint development agreement
Research and development expense			$ 2,579	$ 3,395	$ 8,383	$ 10,912
Joint Development Agreement \| Global Foundries, 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
Research and development expense			0	$ 400	0	$ 1,600
Collaborative Agreement \| Silterra
Joint development agreement
Non-recurring engineering cost obligation		$ 1,000
JCA costs			$ 0		$ 0		$ 600