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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	9 Months Ended
	Feb. 28, 2019	Feb. 28, 2018
Net loss	$ (1,607,730)	$ (798,211)
Adjustments to reconcile net loss to net cash used in operating activities
Depreciation and amortization	128,114	139,864
Stock option expense	146,514	10,927
Change in allowance on accounts receivable	13,192	4,357
Inventory reserve	7,249	(465)
Increase in deferred rent liability	5,360	12,454
Changes in assets and liabilities:
Accounts receivable	(290,727)	(101,979)
Inventories	91,244	(224,069)
Prepaid expenses	46,772	(144,850)
Other assets	(8,984)	31,825
Accounts payable and accrued expenses	197,386	198,044
Accrued compensation	13,902	19,935
Net cash used in operating activities	(1,257,708)	(852,168)
Cash flows from investing activities:
Purchases of property and equipment	(72,947)	(74,303)
Increase in intangibles	(46,226)
Net cash used in investing activities	(119,173)	(74,303)
Net cash flows from financing activities:
Net proceeds from sales of common stock	1,011,636	285,733
Proceeds from exercise of stock options	82,990	18,614
Common stock subscribed	2,672
Net cash provided by financing activities	1,097,298	304,347
Effect of exchange rate changes in cash	(7,385)	(6,308)
Net decrease in cash and cash equivalents	(286,968)	(628,432)
Cash and cash equivalents at beginning of period	1,204,903	1,225,462
Cash and cash equivalents at end of period	917,935	597,030
Non-cash investing and financing activities:
Subscriptions receivable	6,390	32,999
Cash paid during the period for:
Interest	47	37
Income taxes		$ 800

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- Definition

Amount of noncash expense for option under share-based payment arrangement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3602-108585

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