Condensed Statements of Cash Flows (USD $)	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income (loss)	$ (240,697)	$ 10,310
Adjustments to reconcile loss to net cash provided by operating activities:
Depreciation and amortization	102,367	72,614
Stock-based compensation expense related to stock options	16,791	14,661
Provision for doubtful accounts, net	7,000	(11,000)
Provision for inventory obsolescence, net	4,000	8,000
Change in operating assets and liabilities:
Accounts receivable	(39,198)	151,689
Inventories	5,243	103,419
Prepaid expenses and other assets	(117,816)	(124,092)
Accounts payable	(381,126)	(587,788)
Accrued compensation and other accrued liabilities	(5,962)	99,629
Net cash (used in) operating activities	(649,398)	(262,558)
Cash flows from investing activities:
Acquisition of property and equipment	(95,166)	(65,768)
Patent costs	(12,392)	(5,905)
Net cash (used in) investing activities	(107,558)	(71,673)
Cash flows from financing activities:
Borrowings from credit facility	725,000
Proceeds from the issuance of common stock		255,000
Cost of the issuance of common stock		(22,286)
Net cash provided by financing activities	725,000	232,714
Net decrease in cash and cash equivalents	(31,956)	(101,517)
Cash and cash equivalents, beginning of period	126,224	564,671
Cash and cash equivalents, end of period	$ 94,268	$ 463,154