Name:	nssi_FairValueAssumptionsExercisePrice1
Namespace Prefix:	nssi_
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Balance Type:	na
Period Type:	duration

- References

No definition available.

Name:	nssi_StockholdersEquityDetailsAbstract
Namespace Prefix:	nssi_
Data Type:	xbrli:stringItemType
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Expected dividends to be paid to holders of the underlying shares or financial instruments (expressed as a percentage of the share or instrument's price).

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=36462937&loc=d3e19207-110258

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Period Type:	duration

Period the instrument, asset or liability is expected to be outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

Name:	us-gaap_FairValueAssumptionsExpectedTerm
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Risk-free interest rate assumption used in valuing an instrument.

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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Period Type:	duration

Weighted average expected volatility of stock price.