Quarterly report pursuant to Section 13 or 15(d)

STOCK BASED COMPENSATION (Details Narrative)

v2.4.1.9
STOCK BASED COMPENSATION (Details Narrative) (USD $)
 3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Issuance of stock options to each of the three non-management director to purchase common stock 35,000nssi_IssuanceOfStockOption  
Issuance of stock options to each of the three non-management directors to purchase common stock, exercise price per share $ 2.34invest_InvestmentOptionsExercisePrice  
Stock-based compensation $ 100,000us-gaap_ShareBasedCompensation $ 27,000us-gaap_ShareBasedCompensation
Unrecognized stock-based compensation cost 202,000us-gaap_EmployeeServiceShareBasedCompensationNonvestedAwardsTotalCompensationCostNotYetRecognizedStockOptions  
Aggregate intrinsic value of options exercisable 2,721,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedAndExpectedToVestExercisableAggregateIntrinsicValue  
Executive Vice President [Member]    
Stock option excercised   75,000nssi_StockOptionExcercised
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveVicePresidentMember
Stock option excercised, exercise price per share   $ 0.68nssi_StockOptionExcercisedPerShare
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveVicePresidentMember
Delivery of shares of common stock by cashless basis   31,098nssi_DeliveryOfSharesOfCommonStockByCashlessBasis
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveVicePresidentMember
Delivery of shares to fund withholding taxes   16,968nssi_DeliveredOfSharesToFundWithholdingTaxe
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveVicePresidentMember
Aggregate value of shares delieverd to fund withholding taxes   $ 28,000nssi_AggregateValueOfSharesDelieverdToFundWithholdingTaxes
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveVicePresidentMember
Net shares issued   26,934us-gaap_StockIssuedDuringPeriodSharesNewIssues
/ us-gaap_TitleOfIndividualAxis
= us-gaap_ExecutiveVicePresidentMember