Quarterly report pursuant to Section 13 or 15(d)

EMPLOYMENT ARRANGEMENTS AND OTHER AGREEMENTS (Details Narrative)

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EMPLOYMENT ARRANGEMENTS AND OTHER AGREEMENTS (Details Narrative) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Mar. 31, 2015
Dec. 31, 2014
Apr. 09, 2014
Nov. 01, 2012
Employment Arrangements And Other Agreements Details Narrative            
Annual base salary Chairman and CEO $ 415,000us-gaap_SalariesWagesAndOfficersCompensation          
Target annual bonus or minimum bonus Chairman and CEO 150,000nssi_ProratedTargetBonus          
Annual cash bonus for CEO     200,000nssi_AnnualCashBonusForCeo      
Issuance of stock option to CEO to purchase common stock       500,000us-gaap_CommonStockCapitalSharesReservedForFutureIssuance    
CEO Stock option, exercise price       $ 1.19us-gaap_FairValueAssumptionsExercisePrice    
Number of shares vested in equal quarterly amounts       41,667nssi_NumberOfSharesVestedInEqualQuarterlyAmounts    
Earned incentive compensation 281,000us-gaap_OfficersCompensation 225,000us-gaap_OfficersCompensation        
CEO Incentive Compensation - percentage of gross royalties - Remote Power Patent           5.00%nssi_CeoIncentiveCompensationPercentageOfRoyaltiesRemotePowerPatent
CEO Incentive Compensation - percentage of net royalties - Additional Patents           10.00%nssi_CeoIncentiveCompensationPercentageOfRoyaltiesAdditionalPatents
CEO Incentive Compensation - percentage of gross royalties - Additional Patents           6.25%nssi_CeoIncentiveCompensationPercentageOfGrossRoyaltiesAdditionalPatents
Number of years option granted to Chief Financial Officer 5 years          
Annual base salary of Chief Financial Officer 157,500us-gaap_SalariesAndWages          
Annual bonus for Chief Financial Officer       $ 30,000us-gaap_AccruedBonusesCurrentAndNoncurrent    
Issuance of 5 year stock option to CFO         50,000nssi_IssuanceOf5YearStockOptionToCfo  
CFO stock option, exercise price         $ 1.65nssi_CfoStockOptionExercisePrice