Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Nov. 30, 2011	Nov. 30, 2010
Cash Flows from Operating Activities:
Net income (loss)	$ 751,141	$ (846,335)
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Depreciation and amortization	581,168	511,552
Stock-based compensation	0	47,984
Changes in receivables	276,067	30,676
Changes in inventory	(738,400)	61,347
Changes in prepaid expenses and other	(24,662)	6,767
Change in other assets	(4,479)	2,740
Changes in accounts payable and accrued expenses	664,152	728,059
Net cash provided by operating activities	1,504,987	542,790
Cash Flows from Investing Activities:
Purchase of property and equipment	(337,731)	(772,193)
Cash Flows from Financing Activities:
Proceeds from note payable to related party	0	500,000
Payments on long-term debt	(721,998)	(190,691)
Payments on advances from related party	(59,000)	(69,001)
Capital contributions to variable interest entity	75,000	0
Distributions by variable interest entity	(31,780)	0
Net cash provided by (used in) financing activities	(737,778)	240,308
Net Increase in Cash	429,478	10,905
Cash, beginning of period	169,420	163,749
Cash, end of period	598,898	174,654
Non-Cash Activities:
Acquisition of equipment by capital lease or debt	563,026	0
Preferred dividend accrual	81,027	162,945
Net decrease in liabilities due to deconsolidation of VIE	990,378	0
Supplemental Information:
Interest paid	$ 278,413	$ 198,379