CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	May 31, 2020	May 31, 2019
CASH FLOWS FROM OPERATING ACTIVITIES:
Net loss	$ (2,339,054)	$ (2,393,060)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	129,172	162,905
Change in provision for allowance for doubtful accounts	(2,129)	15,415
Inventory reserve	17,714	6,300
Stock option expense	200,470	151,224
Reduction (increase) in deferred rent liability	(37,971)	6,615
Decrease in deferred tax asset		10,000
Amortization of right-of-use asset	269,460
Changes in assets and liabilities:
Accounts receivable	(309,090)	(670,126)
Inventories	(717,460)	21,387
Prepaid expenses and other	(1,306,681)	98,007
Reduction in lease liability	(199,483)
Other assets	(41,361)	(13,677)
Accounts payable and accrued expenses	(12,883)	343,994
Accrued compensation	51,798	16,977
Net cash used in operating activities	(4,297,498)	(2,244,039)
CASH FLOWS FROM INVESTING ACTIVITIES:
Increase in intangibles	(85,319)	(69,974)
Purchases of property and equipment	(33,608)	(101,137)
Net cash used in investing activities	(118,927)	(171,111)
CASH FLOWS FROM FINANCING ACTIVITIES:
Common stock subscribed		9,062
Proceeds from sale of convertible preferred stock, net	1,917,586
Proceeds from sales of common stock, net	10,232,857	1,776,575
Proceeds from exercise of stock options	223,534	121,790
Net cash provided by financing activities	12,373,977	1,907,427
Effect of exchange rate changes on cash	(3,310)	(10,395)
Net increase (decrease) in cash and cash equivalents	7,954,242	(518,118)
CASH AND CASH EQUIVALENTS, beginning of year	686,785	1,204,903
CASH AND CASH EQUIVALENTS, end of year	8,641,027	686,785
Cash paid during the year for:
Interest	9	47
Income taxes	7,390	14,237
Non-cash Investing and Financing Activities:
Establishment of Right-of-use asset per ASC 842	1,942,999
Establishment of Lease liability per ASC 842	$ 1,980,970