XML 90 R49.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Goodwill and Intangible Assets - Textual (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 27, 2014 | Dec. 28, 2013 | Dec. 29, 2012
Finite-Lived Intangible Assets [Line Items] |  |  |
Total amortization expense | $ 3,100,000 nano_AmortizationExpenseFiniteLivedIntangibleAssets | $ 3,300,000 nano_AmortizationExpenseFiniteLivedIntangibleAssets | $ 3,300,000 nano_AmortizationExpenseFiniteLivedIntangibleAssets
Impairment charges | $ 0 us-gaap_IndefiniteLivedIntangibleAssetsPeriodIncreaseDecrease |  |
Minimum [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangibles estimated lives | 2 years |  |
Maximum [Member] |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Finite-lived intangibles estimated lives | 10 years |  |

X
- Definition Amortization expense finite lived intangible assets. + References No definition available. + Details
Name: | nano_AmortizationExpenseFiniteLivedIntangibleAssets
Namespace Prefix: | nano_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of increase (decrease) of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
Name: | us-gaap_IndefiniteLivedIntangibleAssetsPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |