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Accounts Receivable - Textual (Details) - USD ($) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 26, 2015 | Sep. 27, 2014 | Sep. 26, 2015 | Sep. 27, 2014 | Dec. 27, 2014
Accounts Receivable (Additional Textual) [Abstract] |  |  |  |  |
Sold receivables amount | $ 2,400,000 | $ 1,300,000 | $ 5,400,000 | $ 2,900,000 |
Due from unrelated third parties | $ 0 |  | $ 0 |  | $ 0
Minimum [Member] |  |  |  |  |
Accounts Receivable (Textual) [Abstract] |  |  |  |  |
Administrative fees as well as interest percent |  |  | 1.15% |  |
Maximum [Member] |  |  |  |  |
Accounts Receivable (Textual) [Abstract] |  |  |  |  |
Administrative fees as well as interest percent |  |  | 1.68% |  |

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- Definition Accounts receivable additional textual. + References No definition available. + Details
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Namespace Prefix: | nano_
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- Definition Accounts receivable. + References No definition available. + Details
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- Definition Administrative fees and interest percent. + References No definition available. + Details
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- Definition Due from unrelated third parties. + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Proceeds from accounts receivable. + References No definition available. + Details
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Namespace Prefix: | nano_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
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Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
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Balance Type: |
Period Type: |