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Document and Entity Information - shares
 9 Months Ended
Nov. 30, 2019
Jan. 14, 2020
Document And Entity Information    
Entity Registrant Name SONO TEK CORP  
Entity Central Index Key 0000806172  
Document Type 10-Q  
Document Period End Date Nov. 30, 2019  
Amendment Flag false  
Current Fiscal Year End Date --02-28  
Is Entity's Reporting Status Current? Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business Flag true  
Entity Common Stock, Shares Outstanding   15,323,831
Document Fiscal Period Focus Q3  
Document Fiscal Year Focus 2020  
Emerging Growth Company false  
Entity Small Business true  
Interactive Data Current Yes  
Entity Incorporation State or Country NY  
Entity File Number 000-16035