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Income Taxes (Details) (USD $)
In Thousands, unless otherwise specified
 3 Months Ended 12 Months Ended
Mar. 31, 2015
Apr. 01, 2014
Dec. 30, 2014
Income Tax Contingency [Line Items]      
(Benefit) provision for income taxes $ (1,795)us-gaap_IncomeTaxExpenseBenefit $ 1,012us-gaap_IncomeTaxExpenseBenefit  
Effective tax rate 39.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations 41.50%us-gaap_EffectiveIncomeTaxRateContinuingOperations 38.40%us-gaap_EffectiveIncomeTaxRateContinuingOperations
Income tax rate 34.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate 35.00%us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate  
Minimum [Member]      
Income Tax Contingency [Line Items]      
Estimated effective tax rate 39.00%ndls_EffectiveIncomeTaxRateReconciliationEstimateofAnnualEffectiveTaxRateforCurrentYearPercent
/ us-gaap_RangeAxis
= us-gaap_MinimumMember		    
Maximum [Member]      
Income Tax Contingency [Line Items]      
Estimated effective tax rate 40.00%ndls_EffectiveIncomeTaxRateReconciliationEstimateofAnnualEffectiveTaxRateforCurrentYearPercent
/ us-gaap_RangeAxis
= us-gaap_MaximumMember