Consolidated Statements of Cash Flows (USD $)	12 Months Ended
	May 31, 2013	May 31, 2012
Cash Flows from Operating Activities:
Net income	$ 2,793,210	$ 2,491,650
Adjustments to reconcile net income to net cash provided by operating activities
Depreciation and amortization	1,387,987	1,165,795
Increase in deferred tax asset	(574,000)	(585,000)
Loss on disposition of equipment	0	131,500
Stock based compensation	53,424	0
Changes in accounts receivable	(742,131)	(919,284)
Changes in inventory	(87,741)	(413,081)
Changes in prepaid expenses	(74,108)	25,900
Changes in accounts payable and accrued expenses	(673,008)	321,709
Other	2,033	(2,640)
Net cash provided by operating activities	2,085,666	2,216,549
Cash Flows from Investing Activities:
Purchase of property and equipment	(620,898)	(801,960)
Cash Flows from Financing Activities:
Payments on advances payable to related parties	(148,500)	(99,900)
Proceeds from long-term debt	250,000	0
Payments on notes and advances payable	(1,291,693)	(1,301,037)
Capital contributions by variable interest entity	0	75,000
Dividends paid by variable interest entity	(102,079)	(63,672)
Net cash used in financing activities	(1,292,272)	(1,389,609)
Net Increase in Cash	172,496	24,980
Cash, beginning of year	194,400	169,420
Cash, end of year	$ 366,896	$ 194,400