Concentrations, Risks and Uncertainties	9 Months Ended
Feb. 28, 2018
Risks and Uncertainties [Abstract]
Concentrations, Risks and Uncertainties	Note 10. Concentrations, Risks and Uncertainties Greystone derived approximately 76% and 67% of its total sales from two customers in fiscal years 2018 and 2017, respectively. The loss of a material amount of business from one or both 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 $1,200,335 and $1,202,381 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 February 28, 2018, Greystone is indebted to Mr. Rosene in the amount of $4,469,355 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

9 Months Ended

Feb. 28, 2018

Note 10. Concentrations, Risks and Uncertainties

Greystone derived approximately 76% and 67% of its total sales from two customers in fiscal years 2018 and 2017, respectively. The loss of a material amount of business from one or both 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 $1,200,335 and $1,202,381 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 February 28, 2018, Greystone is indebted to Mr. Rosene in the amount of $4,469,355 for a note payable due January 15, 2020. There is no assurance that Mr. Rosene will renew the note as of the maturity date.