Consolidated Statements of Cash Flows (Unaudited) (USD $)	6 Months Ended
	Nov. 30, 2013	Nov. 30, 2012
Cash Flows from Operating Activities:
Net income	$ 1,572,154	$ 1,103,544
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	674,473	659,013
Deferred income taxes	(253,000)	(219,300)
Stock-based compensation	26,712	26,712
Changes in receivables	483,064	152,769
Changes in inventory	(872,480)	(176,924)
Changes in prepaid expenses and other	(138,043)	(123,706)
Change in other assets	2,454	4,143
Changes in accounts payable and accrued expenses	169,551	(341,191)
Net cash provided by operating activities	1,664,885	1,085,060
Cash Flows from Investing Activities:
Purchase of property and equipment	(705,710)	(280,176)
Cash Flows from Financing Activities:
Payments on long-term debt and capitalized leases	(669,574)	(638,902)
Payments on advances from related party	(34,500)	0
Distributions by variable interest entity	0	(47,082)
Net cash used in financing activities	(704,074)	(685,984)
Net Increase in Cash	255,101	118,900
Cash, beginning of period	366,896	194,400
Cash, end of period	621,997	313,300
Non-Cash Activities:
Preferred dividend accrual	162,945	164,726
Supplemental Information:
Interest paid	$ 181,029	$ 219,921