Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Services Agreement (Details Narrative)

v2.4.1.9
COMMITMENTS AND CONTINGENCIES - Services Agreement (Details Narrative) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Dec. 31, 2014
Dec. 31, 2013
Feb. 10, 2015
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Company paid for service agreement termination         $ 285,000nssi_CompanyPaidForServiceAgreementTerminated
General and administrative expenses 1,105,000us-gaap_GeneralAndAdministrativeExpense 598,000us-gaap_GeneralAndAdministrativeExpense      
Accrued expense (38,000)us-gaap_IncreaseDecreaseInAccruedLiabilities 903,000us-gaap_IncreaseDecreaseInAccruedLiabilities      
Service Agreement with ThinkFire          
Purchase Commitment, Excluding Long-term Commitment [Line Items]          
Fees for services performed on behalf of entity     105,000nssi_FeesForServicesPerformed
/ us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis
= nssi_ServiceAgreementwithThinkFireMember
104,000nssi_FeesForServicesPerformed
/ us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis
= nssi_ServiceAgreementwithThinkFireMember
 
General and administrative expenses 261,000us-gaap_GeneralAndAdministrativeExpense
/ us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis
= nssi_ServiceAgreementwithThinkFireMember
       
Accrued expense     $ 24,000us-gaap_IncreaseDecreaseInAccruedLiabilities
/ us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis
= nssi_ServiceAgreementwithThinkFireMember