Commitments and Contingencies	6 Months Ended
Nov. 30, 2017
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies Disclosure [Text Block]	Note 5: Commitments and Contingencies On June 18, 2009, the Company entered into an agreement to lease a building in Irvine, California. The lease commenced September 1, 2009 and ended August 31, 2016. The initial base rent was set at $18,490 per month with scheduled annual increases through the end of the lease term. The rent was $22,080. In November 2015, the Company signed the First Amendment to Lease to extend the lease until August 31, 2021. The initial base rent for the lease amendment which started September 1, 2016 is $21,000 per month. In November 2016, the Company’s subsidiary, Biomerica de Mexico, entered into a ten year lease for approximately 8,100 square feet at a monthly rent of $2,926. The yearly rate is subject to an annual adjustment for inflation according to the United States Bureau of Labor Statistics Consumer Price Index For All Urban Consumers. In accordance with the terms of the lease agreement, in November 2017 the rent was increased to $3,017 per month. Biomerica, Inc., is not a guarantor of such lease. In September 2017, the Company signed a Clinical Samples Agreement with the University of Southern California for the purpose of providing clinical samples for use by the Company in conducting future clinical trials for one of the products which the Company is developing. The work started in October 2017 with charges for work performed being invoiced and paid monthly. On October 12, 2017, the Company’s wholly owned subsidiary, BioEurope, signed a Distribution Agreement (the “Agreement”) with a distributor to distribute certain products in the United Mexican States. The Agreement is for a period of three years with certain minimum purchases required. On November 20, 2017, Biomerica announced the enrollment of its first patient at the University of Southern California for the Company's Helicobacter pylori test. On November 7, 2017, Biomerica announced that it has extended its exclusive license agreement with Celtis Pharm Co. Ltd of South Korea. Celtis has changed its name to Telcon Pharmaceuticals (“Telcon”). The License Agreement grants Telcon an exclusive license to market and sell Biomerica’s InFoods® IBS (Irritable Bowel Syndrome) products in Korea for five years. The amended agreement may now be cancelled if Biomerica has not obtained final clearance for sale of the Products in the United States from the United States FDA on or before December 31, 2019.

Note 5: Commitments and Contingencies

On June 18, 2009, the Company entered into an agreement to lease a building in Irvine, California. The lease commenced September 1, 2009 and ended August 31, 2016. The initial base rent was set at $18,490 per month with scheduled annual increases through the end of the lease term. The rent was $22,080. In November 2015, the Company signed the First Amendment to Lease to extend the lease until August 31, 2021. The initial base rent for the lease amendment which started September 1, 2016 is $21,000 per month.

In November 2016, the Company’s subsidiary, Biomerica de Mexico, entered into a ten year lease for approximately 8,100 square feet at a monthly rent of $2,926. The yearly rate is subject to an annual adjustment for inflation according to the United States Bureau of Labor Statistics Consumer Price Index For All Urban Consumers. In accordance with the terms of the lease agreement, in November 2017 the rent was increased to $3,017 per month. Biomerica, Inc., is not a guarantor of such lease.

In September 2017, the Company signed a Clinical Samples Agreement with the University of Southern California for the purpose of providing clinical samples for use by the Company in conducting future clinical trials for one of the products which the Company is developing. The work started in October 2017 with charges for work performed being invoiced and paid monthly.

On October 12, 2017, the Company’s wholly owned subsidiary, BioEurope, signed a Distribution Agreement (the “Agreement”) with a distributor to distribute certain products in the United Mexican States. The Agreement is for a period of three years with certain minimum purchases required.

On November 20, 2017, Biomerica announced the enrollment of its first patient at the University of Southern California for the Company's Helicobacter pylori test.

On November 7, 2017, Biomerica announced that it has extended its exclusive license agreement with Celtis Pharm Co. Ltd of South Korea. Celtis has changed its name to Telcon Pharmaceuticals (“Telcon”). The License Agreement grants Telcon an exclusive license to market and sell Biomerica’s InFoods® IBS (Irritable Bowel Syndrome) products in Korea for five years. The amended agreement may now be cancelled if Biomerica has not obtained final clearance for sale of the Products in the United States from the United States FDA on or before December 31, 2019.