Quarterly report pursuant to Section 13 or 15(d)

Document And Entity Information

Document And Entity Information - shares
9 Months Ended
Sep. 30, 2021
Nov. 12, 2021
Document Information [Line Items]    
Entity Central Index Key 0000855683  
Entity Registrant Name MILESTONE SCIENTIFIC INC.  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2021  
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2021  
Document Transition Report false  
Entity File Number 001-14053  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 13-3545623  
Entity Address, Address Line One 425 Eagle Rock Avenue Suite 403  
Entity Address, City or Town Roseland  
Entity Address, State or Province NJ  
Entity Address, Postal Zip Code 07068  
City Area Code 973  
Local Phone Number 535-2717  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Shell Company false  
Title of 12(b) Security Common Stock  
Trading Symbol MLSS  
Security Exchange Name NYSE  
Entity Common Stock, Shares Outstanding   67,845,930