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Geographical Data (Tables) | 3 Months Ended
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Sep. 30, 2014
Schedule Of Revenue From External Customers And Identifiable Assets By Geographical Areas | The following represents selected consolidated geographical data: Financial Information Relating to Domestic and Foreign Operations
|  | Three months ended September 30, |
|  | 2014 |  | 2013 |
|  | (in thousands) |
Sales to external customers(1): |  |  |  |  |  |  |
Domestic |  | $ | 16,572 |  | $ | 16,293 |
Foreign |  |  | 764 |  |  | 946 |
Total Net Sales |  | $ | 17,336 |  | $ | 17,239 |
|  | September 30, 2014 |  | June 30, 2014 |
Identifiable assets: |  |  |  |  |  |  |
United States |  | $ | 47,955 |  | $ | 49,529 |
Dominican Republic (2) |  |  | 14,682 |  |  | 13,835 |
Total Identifiable Assets |  | $ | 62,637 |  | $ | 63,364 |
(1) All of the Company's sales originate in the United States and are shipped primarily from the Company's facilities in the United States. There were no sales into any one foreign country in excess of 10% of total Net Sales. (2) Consists primarily of inventories (September 30, 2014 = $11,227; June 30, 2014 = $10,216) and fixed assets (September 30, 2014 = $3,397; June 30, 2014 = $3,475) located at the Company's principal manufacturing facility in the Dominican Republic.

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- Definition Tabular disclosure of domestic and foreign revenue recognized during the period, and the location of the entity's assets as of the balance-sheet date. + References No definition available. + Details
Name: | nssc_ScheduleOfRevenueFromExternalCustomersAndIdentifiableAssetsByGeographicalAreasTableTextBlock
Namespace Prefix: | nssc_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration