Consolidated Statements of Cash Flows - USD ($)	12 Months Ended
	May 31, 2024	May 31, 2023
Cash flows from operating activities:
Net loss	$ (5,978,000)	$ (7,140,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	81,000	84,000
(Recovery) provision for allowance for credit losses	(10,000)	342,000
Inventory reserve	(205,000)	(174,000)
Share-based compensation	837,000	1,185,000
Amortization of right-of-use asset	293,000	267,000
Changes in assets and liabilities:
Accounts receivable	(215,000)	(291,000)
Inventories	(115,000)	534,000
Prepaid expenses and other	62,000	20,000
Other assets	(44,000)	18,000
Accounts payable and accrued expenses	246,000	(80,000)
Accrued compensation	(41,000)	49,000
Advances from customers	25,000	9,000
Reduction in lease liabilities	(297,000)	(297,000)
Net cash used in operating activities	(5,361,000)	(5,474,000)
Cash flows from investing activities:
Purchases of property and equipment	(51,000)	(64,000)
Expenditures related to intangibles	(64,000)	(14,000)
Net cash used in investing activities	(115,000)	(78,000)
Cash flows from financing activities:
Gross proceeds from sale of common stock		10,014,000
Deferred offering costs	(81,000)
Costs from sale of common stock		(705,000)
Proceeds from exercise of stock options		81,000
Net cash (used in) provided by financing activities	(81,000)	9,390,000
Effect of exchange rate changes in cash	8,000	(36,000)
Net (decrease) increase in cash and cash equivalents	(5,549,000)	3,802,000
Cash and cash equivalents at beginning of year	9,719,000	5,917,000
Cash and cash equivalents at end of year	4,170,000	9,719,000
Cash paid during the period for:
Income taxes	41,000	51,000
Non-cash investing and financing activities:
Write off of fixed assets, cost		40,000
Write off of fixed assets, accumulated depreciation		40,000
Write off of intangible assets, cost		6,000
Write off of intangible assets, accumulated amortization		$ 6,000