Leases - Schedule of Undiscounted future non-cancellable lease payments (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Future lease payments
Remainder of 2025	$ 370
2026	1,497
2027	1,380
2028	595
Thereafter	48
Total lease payments	3,890
Less: imputed interest	(222)
Total lease liabilities	3,668
Lease liabilities, current portion	(1,361)	$ (1,306)
Total lease liabilities, net of current portion	$ 2,307	$ 3,336

Present value of lessee's discounted obligation for lease payments from leases.

No definition available.

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- Definition

Present value of lessee's discounted obligation for lease payments from leases, classified as current.

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No definition available.

+ Details

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- Definition

Present value of lessee's discounted obligation for lease payments from lease, classified as noncurrent.

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No definition available.

+ Details

Name:	mram_LeaseLiabilityNoncurrent
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payments for leases.

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No definition available.

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Name:	mram_LesseeLeaseLiabilityPaymentsDue
Namespace Prefix:	mram_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payments for lease, due in third fiscal year following latest fiscal year.

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No definition available.

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Name:	mram_LesseeLeaseLiabilityPaymentsDueYearThree
Namespace Prefix:	mram_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for lease due after fourth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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No definition available.

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Name:	mram_LesseeLeaseLiabilityToBePaidAfterYearFour
Namespace Prefix:	mram_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payment for lease to be paid in next fiscal year following current fiscal year.

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No definition available.

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Name:	mram_LesseeLeaseLiabilityToBePaidYearOne
Namespace Prefix:	mram_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payments in excess of discounted obligation for lease payments for leases.

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No definition available.

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Name:	mram_LesseeLeaseLiabilityUndiscountedExcessAmount
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- Definition

Amount of lessee's undiscounted obligation for lease payments for lease, due in second fiscal year following latest fiscal year.

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No definition available.

+ Details

Name:	mram_LesseeLiabilityPaymentsDueYearTwo
Namespace Prefix:	mram_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of lessee's undiscounted obligation for lease payments for lease having an initial or remaining lease term in excess of one year due in remainder of fiscal year following latest fiscal year.

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No definition available.

+ Details

Name:	mram_LesseeLiabilityPaymentsRemainderOfFiscalYear
Namespace Prefix:	mram_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- References

No definition available.

+ Details

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