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Note 8 - Property and Equipment, Net (Tables) | 12 Months Ended
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Mar. 30, 2014
Property, Plant and Equipment [Abstract] |
Schedule of Property, Plant and Equipment Carrying Value [Table Text Block] |
|  | March 30, 2014 |  |  | March 31, 2013 |
Land |  | $ | 1,197 |  |  | $ | 1,197 |
Building and improvements |  |  | 2,161 |  |  |  | 2,045 |
Machinery, equipment, furniture and fixtures |  |  | 6,349 |  |  |  | 5,460 |
Leasehold improvements |  |  | 6,792 |  |  |  | 3,878 |
Construction-in-progress |  |  | 25 |  |  |  | 569 |
|  |  | 16,524 |  |  |  | 13,149 |
Less: accumulated depreciation and amortization |  |  | 7,554 |  |  |  | 7,361 |
|  | $ | 8,970 |  |  | $ | 5,788 |

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- Definition Tabular disclosure of the gross and net amount of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
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Namespace Prefix: | nath_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration