Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($)	9 Months Ended
	Feb. 28, 2025	Feb. 29, 2024
Cash flows from operating activities:
Net loss	$ (3,429,000)	$ (4,557,000)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	64,000	59,000
Provision (recovery) for allowance for credit losses	7,000	(6,000)
Inventory reserve	(45,000)	(181,000)
Share-based compensation	352,000	633,000
Amortization of right-of-use asset	232,000	218,000
Changes in assets and liabilities:
Accounts receivable	(327,000)	(402,000)
Inventories	766,000	109,000
Prepaid expenses and other	15,000	33,000
Other assets	6,000	(26,000)
Accounts payable and accrued expenses	(506,000)	(8,000)
Accrued compensation	(43,000)	6,000
Advance from customers	(30,000)	25,000
Reduction in lease liabilities	(242,000)	(220,000)
Net cash used in operating activities	(3,180,000)	(4,317,000)
Cash flows from investing activities:
Purchases of property and equipment		(27,000)
Expenditures related to intangibles	(37,000)	(64,000)
Net cash used in investing activities	(37,000)	(91,000)
Cash flows from financing activities:
Gross proceeds from sale of common stock	2,143,000
Costs from sale of common stock	(128,000)
Deferred offering costs	85,000
Proceeds from exercise of stock options	16,000
Net cash provided by financing activities	2,116,000
Effect of exchange rate changes in cash	(11,000)	8,000
Net decrease in cash and cash equivalents	(1,112,000)	(4,400,000)
Cash and cash equivalents at beginning of year	4,170,000	9,719,000
Cash and cash equivalents at end of period	3,058,000	5,319,000
Cash paid during the period for:
Income taxes		$ 34,000