Condensed Statements of Cash Flows (USD $)	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Cash flows from operating activities:
Net income (loss)	$ 10,310	$ (20,504)
Adjustments to reconcile loss to net cash provided by operating activities:
Depreciation and amortization	72,614	63,289
Stock-based compensation expense related to stock options	14,661	23,083
Provision for doubtful accounts, net	(11,000)	(1,000)
Provision for inventory obsolescence, net	8,000	(20,000)
Change in operating assets and liabilities:
Accounts receivable	151,689	2,024
Inventories	103,419	(69,094)
Prepaid expenses and other assets	(124,092)	(63,832)
Accounts payable	(587,788)	81,833
Accrued compensation and other accrued liabilities	99,629	51,761
Net cash provided by (used in) operating activities	(262,558)	47,560
Cash flows from investing activities:
Acquisition of property and equipment	(65,768)	(169,410)
Patent costs	(5,905)	(9,981)
Net cash (used in) investing activities	(71,673)	(179,391)
Cash flows from financing activities:
Borrowings from credit facility		200,000
Proceeds from the issuance of common stock	255,000
Cost of the issuance of common stock	(22,286)
Net cash provided by financing activities	232,714	200,000
Net increase (decrease) in cash and cash equivalents	(101,517)	68,169
Cash and cash equivalents, beginning of period	564,671	120,008
Cash and cash equivalents, end of period	$ 463,154	$ 188,177