Concentrations	12 Months Ended
May 31, 2017
Risks and Uncertainties [Abstract]
Concentrations	Note 12. CONCENTRATIONS For the fiscal years 2017 and 2016, Greystone had two customers that accounted for approximately 71% and 56% of total sales, respectively. Greystone purchases damaged pallets from its customers at a price based on the value of the raw material content of the pallet. A majority of these purchases are from one of Greystone’s major customers which were approximately $1,611,000 and $1,605,000 in fiscal years 2017 and 2016, respectively.

The entire disclosure for any concentrations existing at the date of the financial statements that make an entity vulnerable to a reasonably possible, near-term, severe impact. This disclosure informs financial statement users about the general nature of the risk associated with the concentration, and may indicate the percentage of concentration risk as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 275
-URI http://asc.fasb.org/topic&trid=2134479

Name:	us-gaap_ConcentrationRiskDisclosureTextBlock
Namespace Prefix:	us-gaap_
Data Type:	nonnum:textBlockItemType
Balance Type:	na
Period Type:	duration