Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	May. 31, 2015	May. 31, 2014
Cash Flows from Operating Activities:
Net income	$ 609,569	$ 3,131,626
Adjustments to reconcile net income to net cash provided by operating activities -
Depreciation and amortization	1,431,823	1,309,573
Decrease (increase) in deferred tax asset	430,763	(1,051,000)
Stock based compensation	53,424	53,424
Changes in trade accounts receivable	501,236	216,031
Changes in related party receivable	(306,243)	(491,682)
Changes in inventory	186,821	(571,786)
Changes in prepaid expenses	76,921	22,028
Changes in accounts payable and accrued expenses	$ 323,155	(459,814)
Other		2,785
Net cash provided by operating activities	$ 3,307,469	2,161,185
Cash Flows from Investing Activities:
Purchase of property and equipment	$ (991,950)	(2,246,101)
Cash Flows from Financing Activities:
Proceeds from long-term debt		12,612,500
Proceeds from revolving loan	$ 850,000	885,000
Payments on long-term debt and capitalized lease	(1,904,607)	(8,640,891)
Payments on revolving loan	$ (935,000)	(500,000)
Payments on notes and advances payable to related parties		(92,000)
Issuance cost of long-term debt		(129,722)
Proceeds from exercised stock options	$ 114,000	140,000
Dividends paid on preferred stock	(298,288)	(3,548,286)
Dividends paid by variable interest entity	(204,000)	(347,318)
Net cash provided by (used in) financing activities	(2,377,895)	379,283
Net Increase (Decrease) in Cash	(62,376)	294,367
Cash, beginning of year	661,263	366,896
Cash, end of year	$ 598,887	$ 661,263