CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (USD $)	3 Months Ended
	Aug. 31, 2011	Aug. 31, 2010
Cash flows from operating activities:
Net income (loss)	$ 117,792	$ (12,186)
Adjustments to reconcile net income (loss) to net cash provided by (used in) operating activities:
Depreciation and amortization	43,048	33,087
Change in provision for losses on accounts receivable	21,521
Inventory reserve	3,006	8,227
Increase in deferred rent liability	1,662	(3,270)
Changes in assets and liabilities:
Accounts receivable	(139,818)	(22,072)
Inventories	47,460	(93,984)
Prepaid expenses and other assets	104,744	5,993
Accounts payable and accrued expenses	(65,211)	(81,359)
Accrued compensation	(26,180)	(33,589)
Net cash provided by (used in) operating activities	108,024	(199,153)
Cash flows from investing activities:
Intangibles	(25,000)	(25,000)
Purchases of property and equipment	(39,473)	(6,578)
Net cash used in investing activities	(64,473)	(31,578)
Cash flows from financing activities:
Payment of equipment loan	(11,726)	(11,040)
Net cash used in financing activities	(11,726)	(11,040)
Effect of exchange rate changes on cash	(440)	(566)
Net increase (decrease) in cash and cash equivalents	31,385	(242,337)
Cash and cash equivalents at beginning of period	989,270	1,055,206
Cash and cash equivalents at end of period	1,020,655	812,869
Supplemental Disclosure of Cash Flow Information:
Cash paid during the quarter for Interest	$ 522	$ 1,958