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Note O - Reclassifications (Details Textual) (Reclassification from License Royalties to Franchise Royalties [Member], USD $) | 3 Months Ended | 9 Months Ended
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Dec. 29, 2013 | Dec. 29, 2013
Reclassification from License Royalties to Franchise Royalties [Member] |  |
Accounting Policies [Abstract] |  |
Prior Period Reclassification Adjustment | $ 9,000 us-gaap_PriorPeriodReclassificationAdjustment / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = nath_ReclassificatinFromLicenseRoyaltiesToFranchiseRoyaltiesMember | $ 31,000 us-gaap_PriorPeriodReclassificationAdjustment / us-gaap_ErrorCorrectionsAndPriorPeriodAdjustmentsRestatementByRestatementPeriodAndAmountAxis = nath_ReclassificatinFromLicenseRoyaltiesToFranchiseRoyaltiesMember

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- Details
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- Definition The amount of a reclassification adjustment made to prior period financial statement amounts. + References No definition available. + Details
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