Consolidated Statements of Cash Flows (Unaudited) (USD $)	3 Months Ended
	Aug. 31, 2014	Aug. 31, 2013
Cash Flows from Operating Activities:
Net income	$ 352,673	$ 1,584,878
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	343,333	337,236
Deferred income taxes	152,700	(253,000)
Stock-based compensation	13,356	13,356
Changes in receivables	966,704	(178,178)
Changes in related party receivables	(115,604)	0
Changes in inventory	(405,953)	(212,629)
Changes in prepaid expenses and other	67,530	(101,744)
Change in other assets	0	1,834
Changes in accounts payable and accrued expenses	69,109	29,742
Net cash provided by operating activities	1,443,848	1,221,495
Cash Flows from Investing Activities:
Purchase of property and equipment	(443,000)	(510,928)
Cash Flows from Financing Activities:
Payments on long-term debt and capitalized leases	(318,163)	(325,084)
Payments on revolving loan	(385,000)	0
Payments on advances from related party	0	(34,500)
Payments on preferred dividends	(54,315)	0
Distributions by variable interest entity	(51,000)	0
Net cash used in financing activities	(808,478)	(359,584)
Net Increase in Cash	192,370	350,983
Cash, beginning of period	661,263	366,896
Cash, end of period	853,633	717,879
Non-Cash Activities:
Acquisition of equipment in exchange for net related party receivable	75,000	0
Preferred dividend accrual	55,206	81,918
Supplemental Information:
Interest paid	$ 101,299	$ 85,689