Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended		6 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2014	Nov. 30, 2013
Income Statement [Abstract]
Sales	$ 3,925,077	$ 4,361,490	$ 9,991,448	$ 10,872,407
Cost of Sales	4,260,438	3,635,151	8,997,651	8,000,696
Gross Profit (Loss)	(335,361)	726,339	993,797	2,871,711
General, Selling and Administrative Expenses	491,000	545,569	1,105,942	1,141,882
Operating Income (Loss)	(826,361)	180,770	(112,145)	1,729,829
Other Income (Expense):
Other income	2,500	3,600	2,500	3,600
Interest expense	(202,574)	(197,094)	(411,417)	(398,275)
Total Other Expense, net	(200,074)	(193,494)	(408,917)	(394,675)
Income (Loss) before Income Taxes	(1,026,435)	(12,724)	(521,062)	1,335,154
Benefit from Income Taxes	368,383	0	215,683	237,000
Net Income (Loss)	(658,052)	(12,724)	(305,379)	1,572,154
Income Attributable to Variable Interest Entities, net	(57,042)	(56,875)	(113,299)	(111,183)
Preferred Dividends	(81,027)	(81,027)	(162,945)	(162,945)
Net Income (Loss) Attributable to Common Stockholders	$ (796,121)	$ (150,626)	$ (581,623)	$ 1,298,026
Income Available to Common Stockholders:
Per Share of Common Stock - Basic			$ (0.02)	$ 0.05
Per Share of Common Stock - Diluted			$ (0.02)	$ 0.05
Basic and Diluted	$ (0.03)	$ (0.01)
Weighted Average Shares of Common Stock Outstanding -
Basic	26,723,564	26,111,201	26,591,666	26,111,201
Diluted	26,723,564	26,111,201	26,591,666	27,558,600
Basic and Diluted	26,723,564	26,111,201