Concentrations, Risks and Uncertainties	3 Months Ended
Aug. 31, 2018
Risks and Uncertainties [Abstract]
Concentrations, Risks and Uncertainties	Note 11. Concentrations, Risks and Uncertainties Greystone derived approximately 84% and 73% of its total sales from three customers in fiscal years 2018 and 2017, respectively. The loss of a material amount of business from one or more of these customers could have a material adverse effect on Greystone. Greystone purchases damaged pallets from its customers at a price based on the value of the raw material content in the pallet. A majority of these purchases, totaling $392,272 and $493,104 in fiscal years 2018 and 2017, respectively, is from one of its major customers. Robert B. Rosene, Jr., a Greystone director, has provided financing and guarantees on Greystone’s bank debt. As of August 31, 2018, Greystone is indebted to Mr. Rosene in the amount of $4,467,330 for a note payable due January 15, 2020. There is no assurance that Mr. Rosene will renew the note as of the maturity date.

Concentrations, Risks and Uncertainties

3 Months Ended

Aug. 31, 2018

Note 11. Concentrations, Risks and Uncertainties

Greystone derived approximately 84% and 73% of its total sales from three customers in fiscal years 2018 and 2017, respectively. The loss of a material amount of business from one or more of these customers could have a material adverse effect on Greystone.

Greystone purchases damaged pallets from its customers at a price based on the value of the raw material content in the pallet. A majority of these purchases, totaling $392,272 and $493,104 in fiscal years 2018 and 2017, respectively, is from one of its major customers.

Robert B. Rosene, Jr., a Greystone director, has provided financing and guarantees on Greystone’s bank debt. As of August 31, 2018, Greystone is indebted to Mr. Rosene in the amount of $4,467,330 for a note payable due January 15, 2020. There is no assurance that Mr. Rosene will renew the note as of the maturity date.