XML 12 R1.htm IDEA: XBRL DOCUMENT v3.19.1
Document And Entity Information - shares
 9 Months Ended
Feb. 28, 2019
Apr. 15, 2019
Document and Entity Information [Abstract]    
Entity Registrant Name BIOMERICA INC.  
Document Type 10-Q  
Current Fiscal Year End Date --05-31  
Entity Common Stock, Shares Outstanding   9,667,188
Amendment Flag false  
Entity Central Index Key 0000073290  
Entity Current Reporting Status Yes  
Entity Filer Category Non-accelerated Filer  
Document Period End Date Feb. 28, 2019  
Document Fiscal Year Focus 2019  
Document Fiscal Period Focus Q3  
Entity Small Business true  
Entity Emerging Growth Company false  
Entity Ex Transition Period false