CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)	12 Months Ended
	May 31, 2012	May 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES
Net income	$ 548,435	$ 157,447
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	180,124	147,810
Change in provision for losses on accounts receivable	80,987	8,998
Inventory reserve	(7,841)	1,227
(Gain) loss on disposal of property and equipment	(101,628)	5,942
Stock option expense	53,616	27,967
Write off of license-related intangible asset		13,982
Increase in deferred rent liability	1,338	8,238
Gain on settlement of vacation accrual		(80,605)
Changes in assets and liabilities:
Accounts receivable	(534,428)	261,769
Inventories	(27,706)	3,815
Prepaid expenses and other	26,863	(49,860)
Other assets	(30,673)	31,886
Accounts payable and other accrued expenses	(90,460)	(121,757)
Accrued compensation	48,785	(88,056)
Net cash provided by operating activities	147,412	328,803
CASH FLOWS FROM INVESTING ACTIVITIES
Investment in distributor		(165,324)
Purchases of property and equipment	(164,798)	(141,084)
Purchases of intangible assets	(50,000)	(125,275)
Proceeds from insurance claim	101,628
Net cash used in investing activities	(113,170)	(431,683)
CASH FLOWS FROM FINANCING ACTIVITIES:
Net borrowings on line of credit	43,000
Proceeds from exercise of stock options and warrants	47,790	83,000
Payments on loan for equipment purchase	(35,390)	(45,109)
Net cash provided by financing activities	55,400	37,891
Effect of exchange rate changes on cash	(1,570)	(947)
Net increase (decrease) in cash and cash equivalents	88,072	(65,936)
CASH AND CASH EQUIVALENTS, beginning of year	989,270	1,055,206
CASH AND CASH EQUIVALENTS, end of year	1,077,342	989,270
SUPPLEMENTAL DISCLOSURE OF CASH-FLOW INFORMATION
Cash paid during year for Interest	$ 1,585	$ 5,641