SUBSEQUENT EVENT	12 Months Ended
May 31, 2012
SUBSEQUENT EVENT	Note 15. SUBSEQUENT EVENT Effective June 1, 2012, Greystone issued stock options to purchase 2,100,000 shares of common stock to certain of its board of directors, officers and employees and cancelled options to purchase 1,300,000. The new options are for a ten year period and are vested at the rate of 25% per year beginning with the first anniversary of the date of the grant. The cost of the options is valued at $214,000 to be accrued over the vesting period of four years.

- Definition

Tabular disclosure of significant events or transactions that occurred after the balance sheet date through the date the financial statements were issued or the date the financial statements were available to be issued. Examples include: the sale of a capital stock issue, purchase of a business, settlement of litigation, losses resulting from fire or flood, losses on receivables, significant realized and unrealized gains and losses that result from changes in quoted market prices of securities, declines in market prices of inventory, changes in authorized or issued debt (SEC), significant foreign exchange rate changes, substantial loans to insiders or affiliates, significant long-term investments, and substantial dividends not in the ordinary course of business.

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