Variable Interest Entities (VIE)	12 Months Ended
May 31, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Variable Interest Entities (VIE)	Note 13. VARIABLE INTEREST ENTITIES (VIE) Greystone Real Estate, L.L.C. GRE, is owned by Warren Kruger, President and CEO, and Robert Rosene, a member of the Board of Directors. GRE was created solely to own and lease one of the buildings that GSM occupies at 2600 Shoreline Drive, Bettendorf, Iowa. In fiscal year 2012, GRE purchased the second building occupied by Greystone, 2601 Shoreline Drive, Bettendorf, Iowa, in a sale and leaseback transaction with Greystone. The buildings, having a carrying value of $3,244,165 and $3,360,037 at May 31, 2016 and 2015, respectively, serve as collateral for GRE’s debt. The debt had a carrying value of $3,021,734 and $3,207,553 at May 31, 2016 and 2015, respectively.

- Definition

Tabular disclosure of the significant judgments and assumptions made in determining whether a variable interest (as defined) held by the entity requires the variable interest entity (VIE) (as defined) to be consolidated and (or) disclose information about its involvement with the VIE, individually or in aggregate (as applicable); the nature of restrictions, if any, on the consolidated VIE's assets and on the settlement of its liabilities reported by an entity in its statement of financial position, including the carrying amounts of such assets and liabilities; the nature of, and changes in, the risks associated with involvement in the VIE; how involvement with the VIE affects the entity's financial position, financial performance, and cash flows; the lack of recourse if creditors (or beneficial interest holders) of the consolidated VIE have no recourse to the general credit of the primary beneficiary (if applicable); the terms of arrangements, giving consideration to both explicit arrangements and implicit variable interests, if any, that could require the entity to provide financial support to the VIE, including events or circumstances that could expose the entity to a loss; the methodology used by the entity for determining whether or not it is the primary beneficiary of the variable interest entity; the significant factors considered and judgments made in determining that the power to direct the activities of a VIE that most significantly impact the VIE's economic performance are shared (as defined); the carrying amounts and classification of assets and liabilities of the VIE included in the statement of financial position; the entity's maximum exposure to loss, if any, as a result of its involvement with the VIE, including how the maximum exposure is determined and significant sources of the entity's exposure to the VIE; a comparison of the carrying amounts of the assets and liabilities and the entity's maximum exposure to loss; information about any liquidity arrangements, guarantees, and (or) other commitments by third parties that may affect the fair value or risk of the entity's variable interest in the VIE; whether or not the entity has provided financial support or other support (explicitly or implicitly) to the VIE that it was not previously contractually required to provide or whether the entity intends to provide that support, including the type and amount of the support and the primary reasons for providing the support; and supplemental information the entity determines necessary to provide.

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