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MARKETABLE SECURITIES (Details Narrative) (USD $)
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3 Months Ended |
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Mar. 31, 2015
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| Corporate bonds face value, 3.9% - 4.5% coupon | $ 1,000,000us-gaap_FinancialInstrumentsOwnedCorporateEquitiesAtFairValue |
| Maturity date of marketable securities | 2021 |
| Corporate Bond 1 [Member] | |
| Corporate bond coupon |
3.90%nssi_CorporateBondCoupon / us-gaap_StatementEquityComponentsAxis = nssi_CorporateBondOneMember |
| Corporate Bond 2 [Member] | |
| Corporate bond coupon |
4.50%nssi_CorporateBondCoupon / us-gaap_StatementEquityComponentsAxis = nssi_CorporateBondTwoMember |
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- Definition
No authoritative reference available. No definition available.
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- Definition
No authoritative reference available. No definition available.
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- Definition
The fair value as of the balance sheet date of firm holdings in corporate stocks (common and preferred), stock options, warrants and any other financial instrument which represents, or provides the ability to obtain, ownership rights in a corporation. Includes both pledged (to counterparties as collateral for financing transactions) and unpledged holdings. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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