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COMMITMENTS AND CONTINGENCIES (Details) - USD ($)
3 Months Ended 12 Months Ended
Sep. 01, 2021
May 07, 2020
Sep. 30, 2017
Nov. 30, 2016
May 25, 2016
Nov. 30, 2015
Aug. 26, 2021
May 31, 2021
May 31, 2020
Jun. 25, 2020
May 28, 2020
Dec. 31, 2019
Sep. 25, 2019
Jul. 22, 2019
Jul. 12, 2019
Jan. 31, 2018
Nov. 30, 2017
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Research and Development Expense               $ 2,410,506 $ 1,910,209                
Accrued Liabilities, Current               151,759 153,299                
University OF Southern California [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs     $ 82,472                            
Research and Development Expense     12,567           2,200                
Other Expenses     $ 14,767                            
Accrued Liabilities, Current               17,064                  
University OF Michigan [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs                                 $ 181,015
Research and Development Expense               20,550 30,900                
Accrued Liabilities, Current               $ 2,050                  
Billed Commitment, Percentage               56.00%                  
University OF Beth Israel Deaconess Medical Center [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs               $ 305,000               $ 142,000  
Research and Development Expense               0 141,640                
Biomerica HP Stool Antigen [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs                             $ 117,200    
Research and Development Expense               13,111 13,355                
Biomerica InFoods [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs                           $ 107,000      
Research and Development Expense               12,675 20,875                
Accrued Liabilities, Current               $ 19,600                  
Billed Commitment, Percentage               31.00%                  
Medical Practice [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs                         $ 136,000        
Research and Development Expense               $ 11,725 45,250                
Accrued Liabilities, Current                 5,975                
Billed Commitment, Percentage               42.00%                  
Biomerica H. Pylori Product [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs                         $ 57,800        
Research and Development Expense                 $ 41,845                
Billed Commitment, Percentage                 72.00%                
Houseton Methodist Research Institute [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs                       $ 133,000          
Research and Development Expense               $ 0 $ 4,000                
Accrued Liabilities, Current               3,550                  
Billed Commitment, Percentage                 3.00%                
Mayo Clinic Arizona [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs                 $ 135,515                
Research and Development Expense               0 17,390                
Accrued Liabilities, Current               $ 3,750                  
Billed Commitment, Percentage               13.00%                  
Mayo Clinic Jacksonville [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs                     $ 135,515            
Accrued Liabilities, Current                 17,390                
Billed Commitment, Percentage               17.00%                  
Related Party Transaction, Amounts of Transaction               $ 22,827                  
University Of Texas Health Science Center [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Clinical Trial Agreement Maximum Budgeted Costs                   $ 139,850              
Research and Development Expense               4,850                  
Accrued Liabilities, Current               $ 3,750                  
Billed Commitment, Percentage               4.00%                  
Royalty Agreements [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Royalty Expense               $ 11,000 15,000                
Telcon Agreement [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Accrued Fees and Other Revenue Receivable         $ 1,250,000                        
Stock Issued During Period, Shares, Other (in Shares)         83,333                        
Proceeds from Fees Received         $ 250,000                        
Royalty Percentage         15.00%                        
Mount Sinai License Agreements [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Related Party Transaction, Purchases from Related Party                 $ 5,100                
Mount Sinai License Agreements [Member] | Subsequent Event [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Related Party Transaction, Purchases from Related Party             $ 2,850                    
UC License Agreements [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Payments for Other Fees   $ 5,000                              
License Maintenance Fee, Payable   $ 10,000                              
UC License Agreements [Member] | Subsequent Event [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Payments for Other Fees             $ 5,000                    
Building In Irvine California [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Operating Lease, Expense               $ 23,637                  
Building In Irvine California [Member] | Subsequent Event [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Rental Expense, Increase During Period $ 25,970                                
Rental Expense, Increase During The Period, Percentage 3.00%                                
Lease Deposit Liability $ 22,080                                
Building In Irvine California [Member] | First Amendment To Lease [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Operating Leases Rent Expenses Minimum Rentals           $ 21,000                      
Rental Expense, Increase During Period           $ 23,637                      
Lease Expiration Date           Aug. 31, 2021                      
Revenue Benchmark [Member] | Royalty Agreements [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Royalty Expense Percentage Of Sales               1.50% 1.80%                
MEXICO                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Operating Lease, Expense               $ 25,351 $ 43,481                
MEXICO | Property Available for Operating Lease [Member]                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Operating Leases Rent Expenses Minimum Rentals       $ 2,926                          
Operating Lease, Expense       $ 3,262                          
Lease Expiration Period       10 years                          
UNITED STATES                                  
COMMITMENTS AND CONTINGENCIES (Details) [Line Items]                                  
Operating Lease, Expense               $ 294,759 $ 300,267