The number of shares a warrant can be converted into that were cancelled.

No definition available.

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- Definition

Class of warrant or right exercisable expiration period.

+ References

No definition available.

+ Details

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- Definition

Percentage points subtracted from the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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- Definition

The percentage of the amount borrowed that must be paid when the loan is prepaid or repaid.

+ References

No definition available.

+ Details

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- Definition

Represents the fair value of warrants.

+ References

No definition available.

+ Details

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- Definition

The increase in the interest rate of the debt in the event of default. Percent increase per annum.

+ References

No definition available.

+ Details

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- Definition

Number of interest and principal payments.

+ References

No definition available.

+ Details

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Data Type:	xbrli:integerItemType
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- Definition

Represents the reimbursement of principal payments per the amended agreement.

+ References

No definition available.

+ Details

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

- Definition

Exercise price per share or per unit of warrants or rights outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(i)(4))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

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Data Type:	num:perShareItemType
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- Definition

Number of securities into which each warrant or right may be converted. For example, but not limited to, each warrant may be converted into two shares.

+ References

No definition available.

+ Details

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 6
-Subparagraph (a)
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-Section 45
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-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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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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Data Type:	xbrli:stringItemType
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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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

- Definition

Amount of cash outflow for cost from early extinguishment and prepayment of debt. Includes, but is not limited to, third-party cost, premium paid, and other fee paid to lender directly for debt extinguishment or debt prepayment. Excludes accrued interest.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3291-108585

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Debt - Credit Facility (Details)			3 Months Ended
Debt - Credit Facility (Details)	Jul. 06, 2018 USD ($) payment $ / shares shares	May 04, 2017 USD ($) payment	Mar. 31, 2019 USD ($)
2017 Credit Facility
Debt
Loan agreement amount		$ 12,000,000
Interest rate			7.77%
Reimbursement of principal payments			$ 1,000,000
End-of-term fee (as a percent)	7.00%	6.00%
Number of shares the warrant can be converted to \| shares	9,375
Warrant exercise price \| $ / shares	$ 8.91
Warrant exercise expiration period	5 years
Fair value of warrants	$ 43,000
Increase in rate in the event of default (as a percentage)			5.00%
2017 Credit Facility \| Prepayment period - first 12 months
Debt
Prepayment fee			$ 240,000
2017 Credit Facility \| Prepayment period - months 13-24
Debt
Prepayment fee			$ 120,000
2017 Credit Facility \| Minimum
Debt
Number of interest and principal payments \| payment	24	24
2017 Credit Facility \| Maximum
Debt
Number of interest and principal payments \| payment	36
2017 Credit Facility \| Prime Rate
Debt
Interest rate, negative basis spread percentage	0.75%	0.75%
Interest rate			4.75%
SVB Credit Facility
Debt
Number of shares the warrant can be converted to that was cancelled \| shares	9,229
Warrant exercise price \| $ / shares	$ 26.00