XML 13 R33.htm IDEA: XBRL DOCUMENT
v2.4.0.6

Acquisition of Business (Narrative) (Detail) (G. Marks Hardware, Inc [Member], USD $) In Thousands, unless otherwise specified | Aug. 18, 2008
--- | ---
G. Marks Hardware, Inc [Member] |
Business Acquisition [Line Items] |
Business acquisition, cost of acquired entity, purchase price excluding direct acquisition costs | $ 25,200
Business acquisition, cost of acquired entity, repayment of acquiree bank debt | $ 1,000

X
- Definition The amount of acquiree debt paid off by the entity as part of the consideration paid to effect the business combination. + References No definition available. + Details
Name: | nssc_BusinessAcquisitionCostOfAcquiredEntityAcquireeDebtRepayment
Namespace Prefix: | nssc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition The cost of the acquired entity including the cash paid to shareholders of acquired entities, fair value of debt and equity securities issued to shareholders of acquired entities, and the fair value of the liabilities assumed. Excludes direct costs of the acquisition. + References No definition available. + Details
Name: | nssc_BusinessAcquisitionCostOfAcquiredEntityPurchasePriceExcludingAcquisitionCosts
Namespace Prefix: | nssc_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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