Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Income Statement [Abstract]
Sales	$ 6,066,371	$ 6,510,917
Cost of Sales	4,737,213	4,365,545
Gross Profit	1,329,158	2,145,372
General, Selling and Administrative Expenses	614,942	596,313
Operating Income	714,216	1,549,059
Other Income (Expense):
Interest expense	(208,843)	(201,181)
Total Other Expense, net	(208,843)	(201,181)
Income before Income Taxes	505,373	1,347,878
(Provision for) Benefit from Income Taxes	(152,700)	237,000
Net Income	352,673	1,584,878
Income Attributable to Variable Interest Entities, net	(56,257)	(54,308)
Preferred Dividends	(81,918)	(81,918)
Net Income Available to Common Stockholders	$ 214,498	$ 1,448,652
Income Available to Common Stockholders:
Per Share of Common Stock - Basic	$ 0.01	$ 0.06
Per Share of Common Stock - Diluted	$ 0.01	$ 0.05
Weighted Average Shares of Common Stock Outstanding -
Basic	26,461,201	26,111,201
Diluted	28,085,729	27,565,047