Statements of Cash Flows - USD ($)	12 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities:
Net loss	$ (880,200)	$ (1,382,746)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization	318,692	382,058
Stock-based compensation expense related to stock options	74,677	62,608
Provision for doubtful accounts, net change	(2,500)	3,500
Provision for inventory obsolescence, net change	170,000	136,501
Change in operating assets and liabilities:
Accounts receivable	128,005	(105,635)
Inventories	436,907	(249,927)
Prepaid expenses and other assets	21,898	(50,299)
Accounts payable	(319,521)	9,252
Accrued compensation and other accrued liabilities	(113,796)	(238,083)
Net cash used in operating activities	(165,838)	(1,432,771)
Cash flows from investing activities:
Acquisition of property and equipment	(77,113)	(29,695)
Patent costs	(21,356)	(32,458)
Net cash used in investing activities	(98,469)	(62,153)
Cash flows from financing activities:
Borrowings from credit facility	323,491	64,000
Change in restricted cash	(25,000)	0
Net cash provided by financing activities	298,491	64,000
Net increase (decrease) in cash and cash equivalents	34,184	(1,430,924)
Cash and cash equivalents, beginning of period	258,656	1,689,580
Cash and cash equivalents, end of period	292,840	258,656
Supplemental disclosures of cash flow information:
Cash paid during the year for interest	$ 14,835	$ 1,250