CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED - USD ($)	6 Months Ended
	Nov. 30, 2022	Nov. 30, 2021
Cash flows from operating activities:
Net loss	$ (3,697,964)	$ (2,667,855)
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Depreciation and amortization	47,690	68,668
Provision for allowance on accounts receivable	369,003	(809,638)
Inventory reserve	(71,633)	181,825
Stock option expense	621,985	634,019
Amortization of right-of-use asset	134,467	126,039
Changes in assets and liabilities:
Accounts receivable	(445,199)	1,139,450
Inventories	426,636	42,229
Prepaid expenses and other	199,562	(726,460)
Other assets	15,933	114,570
Accounts payable and accrued expenses	(302,299)	997,327
Accrued compensation	50,235	285,431
Advance from customers	(1,657)	2,150,466
Reduction in lease liability	(133,283)	(117,321)
Net cash (used in) provided by operating activities	(2,786,524)	1,418,750
Cash flows from investing activities:
Expenditures related to intangibles		(108,917)
Purchases of property and equipment	(58,098)	(18,212)
Net cash used in investing activities	(58,098)	(127,129)
Cash flows from financing activities:
Gross proceeds from sale of common stock	1,988,422	1,751,222
Costs from sale of common stock	(51,940)	(67,108)
Proceeds from exercise of stock options	79,155	34,480
Net cash provided by financing activities	2,015,637	1,718,594
Effect of exchange rate changes on cash	(21,477)	(10,363)
Net (decrease) increase in cash and cash equivalents	(850,462)	2,999,852
Cash and cash equivalents at beginning of year	5,916,983	4,199,311
Cash and cash equivalents at end of the period	5,066,521	7,199,163
Cash paid during the period for:
Income taxes	3,211	10,646
Non-cash investing and financing activities:
Increase in right-of-use asset due to CPI rent adjustment	2,089
Increase in lease liability due to CPI rent adjustment	2,089
Write off of intangible assets, cost	6,489
Write off of intangible assets, accumulated amortization	$ 850