Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2019
Mar. 16, 2020
Jun. 28, 2019
Document And Entity Information      
Entity Registrant Name NETWORK 1 TECHNOLOGIES INC,    
Entity Central Index Key 0001065078    
Document Type 10-K/A    
Amendment Flag false    
Entity Voluntary Filers No    
Current Fiscal Year End Date --12-31    
Entity Well Known Seasoned Issuer No    
Entity Small Business true    
Entity Shell Company false    
Entity Emerging Growth Company false    
Entity Current Reporting Status Yes    
Document Period End Date Dec. 31, 2019    
Entity Filer Category Non-accelerated Filer    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2019    
Entity Common Stock Shares Outstanding   24,032,918  
Entity Public Float     $ 35,940,427
EntityFileNumber 1-15288    
EntityAddressAddressLine1 445 Park Avenue    
EntityAddressAddressLine2 Suite 912    
EntityAddressPostalZipCode 10022    
EntityTaxIdentificationNumber 113027591    
EntityAddressCityOrTown Delaware    
LocalPhoneNumber 829-5770    
CityAreaCode 212    
EntityAddressStateOrProvince NEW YORK