Quarterly report pursuant to Section 13 or 15(d)

LEGAL PROCEEDINGS (Details narrative)

v2.4.1.9
LEGAL PROCEEDINGS (Details narrative) (USD $)
1 Months Ended 51 Months Ended 55 Months Ended
Jul. 31, 2010
Mar. 31, 2020
Dec. 31, 2015
Legal Proceedings Details Narrative      
Royalties received from license defendants upon setlement $ 32,000,000us-gaap_ProceedsFromLicenseFeesReceived    
Maximum Cisco royalty payment per year     8,000,000us-gaap_PaymentsForRoyalties
Maximum Cisco royalty payment per year for remaning term of the patent   $ 9,000,000nssi_IncomeFromRemainingTermOfPatent