CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (Unaudited) (USD $)	3 Months Ended		9 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2011	Dec. 31, 2010
Net sales	$ 3,673,235	$ 4,261,222	$ 11,337,800	$ 9,772,435
Cost of sales	2,227,856	2,395,206	6,547,563	5,354,804
Gross margin	1,445,379	1,866,016	4,790,237	4,417,631
Operating expenses:
Selling, general and administrative	724,636	686,380	2,191,332	2,137,055
Engineering, research and development	633,136	767,366	2,160,107	2,385,802
Total operating expenses	1,357,772	1,453,746	4,351,439	4,522,857
Income (loss) from operations	87,607	412,270	438,798	(105,226)
Other income (expense):
Amortization of debt discount	(13,386)	(19,164)	(40,177)	(33,678)
Amortization of debt expense	(27,081)	(27,080)	(81,241)	(33,098)
Change in fair value of common stock warrants	130,433	(129,684)	66,738	(129,684)
Gain on sale of capital asset	500		500	3,600
Proceeds from life insurance policy			300,029
Interest income	224	71	418	219
Interest expense	(103,155)	(102,016)	(302,265)	(172,715)
Total other expense	(12,465)	(277,873)	(55,998)	(365,356)
Income (loss) before income taxes	75,142	134,397	382,800	(470,582)
Income tax expense (benefit)	(22,289)	105,385	6,204	(136,188)
Net income (loss)	$ 97,431	$ 29,012	$ 376,596	$ (334,394)
Basic income (loss) per common share (in Dollars per share)	$ 0.04	$ 0.01	$ 0.14	$ (0.13)
Diluted income (loss) per common share (in Dollars per share)	$ 0.04	$ 0.01	$ 0.14	$ (0.13)
Weighted average shares outstanding:
Basic (in Shares)	2,652,864	2,626,149	2,650,032	2,621,417
Diluted (in Shares)	2,706,078	2,642,747	2,718,720	2,621,417