Consolidated Statements of Cash Flows (Unaudited) - USD ($)	3 Months Ended
	Aug. 31, 2015	Aug. 31, 2014
Cash Flows from Operating Activities:
Net income	$ 48,396	$ 352,673
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	388,324	343,333
Deferred income taxes	(5,285)	152,700
Stock-based compensation	13,356	13,356
Changes in trade receivables	(349,570)	966,704
Changes in related party receivable	33,076	(115,604)
Changes in inventory	(624,923)	(405,953)
Changes in prepaid expenses and other	10,249	$ 67,530
Change in other assets	(1,303)
Changes in accounts payable and accrued expenses	1,817,402	$ 69,109
Net cash provided by operating activities	1,329,722	1,443,848
Cash Flows from Investing Activities:
Purchase of property and equipment	(282,534)	(443,000)
Cash Flows from Financing Activities:
Payments on long-term debt and capitalized leases	(495,855)	(318,163)
Payments on revolving loan	(300,000)	(385,000)
Payments on preferred dividends	(81,027)	(54,315)
Distributions by variable interest entity	(51,000)	(51,000)
Net cash used in financing activities	(927,882)	(808,478)
Net Increase in Cash	119,306	192,370
Cash, beginning of period	598,887	661,263
Cash, end of period	$ 718,193	853,633
Non-Cash Activities:
Acquisition of equipment from related party		75,000
Preferred dividend accrual	$ 55,206	55,206
Supplemental Information:
Interest paid	$ 126,646	$ 101,299