Condensed Statements of Cash Flows (Unaudited) - USD ($)	6 Months Ended
	Sep. 30, 2023	Sep. 30, 2022
Cash flows (used in) operating activities:
Net (loss)	$ (147,983)	$ (14,720)
Adjustments to reconcile net (loss) to net cash (used in) operating activities:
Depreciation and amortization	43,775	41,329
Stock-based compensation expense related to stock options	26,149	25,207
Provision for (recovery from) inventory obsolescence, net change	64,000	29,000
Change in operating assets and liabilities:
Right of use asset, net	(97,490)	(19,039)
Accounts receivable	(103,629)	32,587
Inventories	193,079	(303,138)
Prepaid expenses and other assets	54,630	50,740
Accounts payable	47,198	(143,470)
Accrued compensation and other accrued liabilities	(82,732)	(36,005)
Net cash (used in) operating activities	(3,003)	(337,509)
Cash flows (used in) investing activities:
Acquisition of property and equipment	(122)	(191,550)
Patent costs	(16,727)	(9,780)
Net cash (used in) investing activities	(16,849)	(201,330)
Cash flows from financing activities:
Net proceeds from options exercised	0	16,400
Borrowing from secured notes	136,887	109,633
Net cash generated by financing activities	136,887	126,033
Net increase (decrease) in cash	117,035	(412,806)
Cash, beginning of fiscal year	188,966	949,645
Cash, end of fiscal quarter	306,001	536,839
Supplemental disclosures of cash flow information:
Cash paid during the year for interest	$ 31,083	$ 6,613