5. Notes Payable (Details) (USD $)	Feb. 28, 2014	May 31, 2013
Notes Payable Details
Term note payable to International Bank of Commerce, interest rate of 4.5%, monthly principal and interest payments of $171,760, maturing January 31, 2019	$ 9,060,440
Revolving note payable to International Bank of Commerce, prime rate of interest plus 0.5% but not less than 4%, due January 31, 2016	725,000
Mortgage note payable by GRE to International Bank of Commerce, interest rate of 4.5%, monthly principal and interest payments of $26,115, due January 31, 2019	3,398,228
Note payable to F&M Bank & Trust Company, prime rate of interest but not less than 4.5%, paid February 3, 2014		4,593,650
Note payable by GRE to F&M Bank & Trust Company, prime rate of interest but not less than 4.75%, paid February 3, 2014		3,366,108
Capitalized lease payable, 5% interest		381,727
Note payable to Robert Rosene, 7.5% interest, due January 15, 2015	2,066,000	2,066,000
Note payable to Warren Kruger, 7.5% interest, due January 15, 2015		527,716
Other notes payable	44,826	66,979
Total Notes Payable	15,294,494	11,002,180
Less: Current portion	(3,956,067)	(1,344,160)
Long-term Debt	$ 11,338,427	$ 9,658,020