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Segment, Geographic, Product and Significant Customer Information - Customers More Than 10% of Revenues (Details) | 12 Months Ended
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Dec. 27, 2014 | Dec. 28, 2013 | Dec. 29, 2012
Samsung Electronics Co. Ltd. [Member] |  |  |
Net revenues: |  |  |
Customers accounted for 10% or more of total revenue | 26.90%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = nano_SamsungElectronicsMember | 14.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = nano_SamsungElectronicsMember | 27.80%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = nano_SamsungElectronicsMember
SK Hynix [Member] |  |  |
Net revenues: |  |  |
Customers accounted for 10% or more of total revenue | 12.20%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = nano_SkHynixMember | 18.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = nano_SkHynixMember | 16.50%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = nano_SkHynixMember
Intel Corporation [Member] |  |  |
Net revenues: |  |  |
Customers accounted for 10% or more of total revenue | 12.60%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = nano_IntelCorporationMember | 30.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = nano_IntelCorporationMember | 22.30%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = nano_IntelCorporationMember
Micron [Member] |  |  |
Net revenues: |  |  |
Customers accounted for 10% or more of total revenue | 10.40%us-gaap_ConcentrationRiskPercentage1 / us-gaap_MajorCustomersAxis = nano_MicronTechnologyInc.Member |  |

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