XML 35 R56.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Equity and Stock Based Compensation Plans (Details Textual) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 27, 2014 | Sep. 28, 2013 | Sep. 27, 2014 | Sep. 28, 2013 | Sep. 26, 2014
Disclosure of Compensation Related Costs, Share-based Payments [Abstract] |  |  |  |  |
Stock options awarded | 0 |  | 74,300 |  |
Weighted average fair value per share of stock options (in dollars per share) |  | $ 7.75 | $ 8.13 | $ 8.55 |
Closing stock price of options (in dollars per share) |  |  |  |  | $ 15.70
Intrinsic value of options exercised | $ 0.4 | $ 0.2 | $ 2.9 | $ 1.7 |

X
- Definition Share based compensation arrangements by share based payment award options share closing price. + References No definition available. + Details
Name: | nano_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsShareClosingPrice
Namespace Prefix: | nano_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

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

X
- Definition Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisesInPeriodTotalIntrinsicValue
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Gross number of share options (or share units) granted during the period. + References No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (d)(1) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration