Annual report pursuant to Section 13 and 15(d)

Document and Entity Information

v3.3.1.900
Document and Entity Information - USD ($)
12 Months Ended
Dec. 31, 2015
Mar. 25, 2016
Jun. 30, 2015
Proceeds from the sale of common stock and warrants, net of expenses, Amount      
Entity Registrant Name FUSION TELECOMMUNICATIONS INTERNATIONAL INC    
Entity Central Index Key 0001071411    
Document Type 10-K    
Document Period End Date Dec. 31, 2015    
Amendment Flag false    
Current Fiscal Year End Date --12-31    
Is Entity a Well-known Seasoned Issuer? No    
Is Entity a Voluntary Filer? No    
Is Entity's Reporting Status Current? Yes    
Entity Filer Category Smaller Reporting Company    
Entity Common Stock, Shares Outstanding   12,788,971  
Entity Public Float     $ 22,750,078
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2015