XML 85 R63.htm IDEA: XBRL DOCUMENT v2.4.1.9
Employee Benefit Plans (Details) (USD $)
12 Months Ended 24 Months Ended
Dec. 30, 2014
Dec. 31, 2013
Jan. 01, 2013
Dec. 31, 2014
Multiemployer Plans [Line Items]        
Required employee service term 6 months      
Required employee age 21 years      
Vesting percentage 100.00%us-gaap_DefinedContributionPlanEmployersMatchingContributionAnnualVestingPercentage      
Weighted-average fair value per share at date of grant $ 10.52us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 6.04us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue $ 2.84us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue  
Employee Stock Purchase Plan [Member]        
Multiemployer Plans [Line Items]        
Maximum employee salary percentage 15.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardMaximumEmployeeSubscriptionRate
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
     
Offering date percentage 85.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPriceOfferingDate
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
     
Purchase date percentage 85.00%us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardDiscountFromMarketPricePurchaseDate
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
     
Number of shares authorized 750,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
     
Shares issued 17,404us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
    35,760us-gaap_StockIssuedDuringPeriodSharesEmployeeStockPurchasePlans
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
Reserved for future issuance 714,240us-gaap_CommonStockCapitalSharesReservedForFutureIssuance
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
     
Risk free interest rate 0.00%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
     
Expected life 7 days      
Expected volatility rate 13.40%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
     
Expected dividend rate 0.00%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
     
Weighted-average fair value per share at date of grant $ 4.11us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
     
Employee stock purchase plan, compensation expense $ 71,495us-gaap_AllocatedShareBasedCompensationExpense
/ us-gaap_SubsidiarySaleOfStockAxis
= us-gaap_EmployeeStockMember
     
Other Assets [Member]        
Multiemployer Plans [Line Items]        
Deferred compensation plan $ 1,300,000ndls_DeferredCompensationPlanLiabilityFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherAssetsMember