XML 58 R36.htm IDEA: XBRL DOCUMENT
v2.4.0.8

Note 1 - Description and Organization of Business (Details) | Mar. 30, 2014
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Entity Operated Units [Member] |
Note 1 - Description and Organization of Business (Details) [Line Items] |
Number of Restaurants | 5
Franchised Units [Member] |
Note 1 - Description and Organization of Business (Details) [Line Items] |
Number of Restaurants | 324

X
- Details
Name: | nath_Note1DescriptionandOrganizationofBusinessDetailsLineItems
Namespace Prefix: | nath_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the number of restaurants. + References No definition available. + Details
Name: | us-gaap_NumberOfRestaurants
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant