CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	May 31, 2016	May 31, 2015
CASH FLOWS FROM OPERATING ACTIVITIES
Net loss	$ (1,499,787)	$ (331,410)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	232,422	253,275
Change in provision for allowance for doubtful accounts	(9,063)	(12,532)
Inventory reserve	27,150	(18,222)
Gain on disposal of property and equipment		(665)
Stock option expense	15,153	10,016
Decrease in deferred rent liability	(28,073)	(20,406)
Decrease (increase) in deferred tax assets	703,000	(298,000)
Changes in assets and liabilities:
Accounts receivable	151,159	348,667
Inventories	137,131	(243,378)
Prepaid expenses and other	50,774	(60,780)
Other assets	1,185	(20,541)
Accounts payable and accrued expenses	(30,581)	(29,136)
Accrued compensation	40,748	17,631
Net cash used in operating activities	(208,782)	(405,481)
CASH FLOWS FROM INVESTING ACTIVITIES
Purchases of property and equipment	(91,556)	(10,503)
Purchases of intangible assets	(3,636)	(14,179)
Proceeds from sales of property and equipment		1,900
Net cash used in investing activities	(95,192)	(22,782)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from sale of common stock	995,978
Proceeds from exercise of stock options	109,936	9,560
Net cash provided by financing activities	1,105,914	9,560
Effect of exchange rate changes on cash	(1,322)	(2,115)
Net increase (decrease) in cash and cash equivalents	800,618	(420,818)
CASH AND CASH EQUIVALENTS, beginning of year	1,088,307	1,509,125
CASH AND CASH EQUIVALENTS, end of year	1,888,925	1,088,307
Cash paid during the period for:
Interest	167	138
Income taxes	$ 800	$ 800