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Stockholders' Equity and Stock-Based Compensation - Option Plans (Details)
Dec. 27, 2014
May 24, 2013
2005 Equity Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares Authorized 7,292,594us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= nano_TwoThousandFiveEquityIncentivePlanMember		 2,600,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= nano_TwoThousandFiveEquityIncentivePlanMember
2002 Non-statutory Stock Option Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares Authorized 1,200,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= nano_TwoThousandTwoNonStatutoryStockOptionPlanMember		  
2000 Employee Stock Option Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares Authorized 2,450,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= nano_TwoThousandEmployeeStockOptionPlanMember		  
2000 Director Stock Option Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares Authorized 250,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= nano_TwoThousandDirectorStockOptionPlanMember		  
Accent Optical Technologies, Inc. Stock Incentive Plan [Member]    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Shares Authorized 205,003us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_PlanNameAxis
= nano_AccentOpticalTechnologiesIncStockIncentivePlanMember