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v3.10.0.1

Nature of Business, Basis of Presentation and Significant Accounting Policies - Estimated Useful Lives of Property, Plant and Equipment (Details) | 12 Months Ended
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Dec. 29, 2018
Building and Improvements [Member] | Minimum [Member] |
Accounting Policies [Line Items] |
Estimated useful lives of depreciable assets | 5 years
Building and Improvements [Member] | Maximum [Member] |
Accounting Policies [Line Items] |
Estimated useful lives of depreciable assets | 40 years
Machinery and equipment [Member] | Minimum [Member] |
Accounting Policies [Line Items] |
Estimated useful lives of depreciable assets | 3 years
Machinery and equipment [Member] | Maximum [Member] |
Accounting Policies [Line Items] |
Estimated useful lives of depreciable assets | 10 years
Furniture and fixtures [Member] | Minimum [Member] |
Accounting Policies [Line Items] |
Estimated useful lives of depreciable assets | 3 years
Furniture and fixtures [Member] | Maximum [Member] |
Accounting Policies [Line Items] |
Estimated useful lives of depreciable assets | 10 years
Software [Member] | Minimum [Member] |
Accounting Policies [Line Items] |
Estimated useful lives of depreciable assets | 3 years
Software [Member] | Maximum [Member] |
Accounting Policies [Line Items] |
Estimated useful lives of depreciable assets | 7 years

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- Definition Accounting policies. + References No definition available. + Details
Name: | nano_AccountingPoliciesLineItems
Namespace Prefix: | nano_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_BuildingAndBuildingImprovementsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_MachineryAndEquipmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_FurnitureAndFixturesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentByTypeAxis=us-gaap_SoftwareAndSoftwareDevelopmentCostsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |