Consolidated Statements of Operations (USD $)	3 Months Ended		6 Months Ended
	Nov. 30, 2011	Nov. 30, 2010	Nov. 30, 2011	Nov. 30, 2010
Sales	$ 6,213,501	$ 5,052,873	$ 11,997,125	$ 10,047,081
Cost of Sales	5,140,878	4,781,367	9,860,901	9,519,823
Gross Profit	1,072,623	271,506	2,136,224	527,258
General, Selling and Administrative Expenses	487,358	497,697	899,345	988,781
Operating Income (Loss)	585,265	(226,191)	1,236,879	(461,523)
Other Income (Expense):
Other Income (Expense)	(3,891)	0	(6,841)	7,650
Interest Expense	(212,544)	(202,502)	(478,897)	(392,462)
Net Income (Loss)	368,830	(428,693)	751,141	(846,335)
Income Attributable to Noncontrolling Interests, net	(50,555)	(20,802)	(46,180)	(41,394)
Preferred Dividends	(81,027)	(81,027)	(81,027)	(162,945)
Net Income (Loss) Available to Common Stockholders	$ 237,248	$ (530,522)	$ 623,934	$ (1,050,674)
Income (Loss) Available to Common Stockholders Per Share of Common Stock - Basic and Diluted	$ 0.01	$ (0.02)	$ 0.02	$ (0.04)
Weighted Average Shares of Common Stock Outstanding - Basic and Diluted (in shares)	26,211,201	26,211,201	26,111,201	26,111,201