XML 30 R26.htm IDEA: XBRL DOCUMENT
v3.19.3

Summary of Significant Accounting Policies - Schedule of Revenue and Accounts Receivable for Each Significant Customer (Details) - Customer Concentration Risk | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Dec. 31, 2018
Revenue | Customer A |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage | 25.00% |  | 19.00% |  |
Revenue | Customer A | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  | 10.00% |  | 10.00% |
Revenue | Customer B |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage | 12.00% |  | 12.00% |  |
Revenue | Customer B | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  | 10.00% |  | 10.00% |
Revenue | Customer C |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage | 10.00% |  |  |  |
Revenue | Customer C | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  | 10.00% | 10.00% | 10.00% |
Revenue | Customer D |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  | 10.00% | 12.00% |  |
Revenue | Customer D | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage | 10.00% |  |  | 10.00% |
Revenue | Customer E |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  | 13.00% | 11.00% | 13.00% |
Revenue | Customer E | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage | 10.00% |  |  |  |
Revenue | Customer F |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  |  | 14.00% |
Revenue | Customer F | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage | 10.00% | 10.00% | 10.00% |  |
Revenue | Customer G |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  | 13.00% |  | 13.00% |
Revenue | Customer G | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage | 10.00% |  | 10.00% |  |
Revenue | Customer H | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage | 10.00% | 10.00% | 10.00% | 10.00% |
Revenue | Customer I | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage | 10.00% | 10.00% | 10.00% | 10.00% |
Revenue | Customer J |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  | 10.00% |  |  |
Revenue | Customer J | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage | 10.00% |  | 10.00% | 10.00% |
Accounts Receivable, net | Customer A |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  | 42.00% |  | 23.00%
Accounts Receivable, net | Customer B | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  | 10.00% |  | 10.00%
Accounts Receivable, net | Customer C |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  |  |  | 11.00%
Accounts Receivable, net | Customer C | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  | 10.00% |  |
Accounts Receivable, net | Customer D | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  | 10.00% |  | 10.00%
Accounts Receivable, net | Customer E | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  | 10.00% |  | 10.00%
Accounts Receivable, net | Customer F | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  | 10.00% |  | 10.00%
Accounts Receivable, net | Customer G | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  | 10.00% |  | 10.00%
Accounts Receivable, net | Customer H |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  |  |  | 21.00%
Accounts Receivable, net | Customer H | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  | 10.00% |  |
Accounts Receivable, net | Customer I |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  |  |  | 11.00%
Accounts Receivable, net | Customer I | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  | 10.00% |  |
Accounts Receivable, net | Customer J | Maximum |  |  |  |  |
Concentration risk |  |  |  |  |
Concentration risk percentage |  |  | 10.00% |  | 10.00%

X
- 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_ConcentrationRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6351-108592 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13531-108611 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 825 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=118260190&loc=d3e13537-108611 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 275 -SubTopic 10 -Section 50 -Paragraph 20 -URI http://asc.fasb.org/extlink&oid=99393423&loc=d3e6404-108592 + Details
Name: | us-gaap_ConcentrationRiskPercentage1
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_RevenueFromContractWithCustomerMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByTypeAxis=us-gaap_CustomerConcentrationRiskMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mram_CustomerAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mram_CustomerBMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mram_CustomerCMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mram_CustomerDMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mram_CustomerEMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mram_CustomerFMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mram_CustomerGMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mram_CustomerHMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mram_CustomerIMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_MajorCustomersAxis=mram_CustomerJMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ConcentrationRiskByBenchmarkAxis=us-gaap_AccountsReceivableMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |