CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) - USD ($)	3 Months Ended
	Aug. 31, 2020	Aug. 31, 2019
Cash flows from operating activities:
Net loss	$ (1,649,415)	$ (506,296)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	32,570	35,278
Change in provision for allowance on accounts receivable	201,375	(6,967)
Inventory reserve	5,005	2,320
Stock option expense	3,808	5,850
Reduction in deferred rent liability		(37,971)
Amortization of right-of-use asset	57,257	102,456
Changes in assets and liabilities:
Accounts receivable	(18,924)	603,107
Inventories	(1,255,573)	(57,568)
Prepaid expenses and other assets	1,038,149	(41,165)
Reduction in lease liability	(49,880)	(54,796)
Other assets	(276,438)
Accounts payable and accrued expenses	284,202	(55,718)
Accrued compensation	30,718	3,316
Net cash used in operating activities	(1,597,146)	(8,154)
Cash flows from investing activities:
Increase in intangibles	(53,158)	(12,100)
Purchases of property and equipment	(39,588)	(2,171)
Net cash used in investing activities	(92,746)	(14,271)
Cash flows from financing activities:
Proceeds from sale of common stock, net		112,608
Proceeds from exercise of stock options	14,900	34,028
Net cash provided by financing activities	14,900	146,636
Effect of exchange rate changes in cash	(1,721)	(3,442)
Net (decrease) increase in cash and cash equivalents	(1,676,713)	120,769
Cash and cash equivalents at beginning of period	8,641,027	686,785
Cash and cash equivalents at end of period	6,964,314	807,554
Cash paid during the period for:
Interest
Income taxes	1,125
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