Condensed Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Condensed Consolidated Statements of Income
Net sales	$ 7,070,292	$ 7,653,586	$ 22,274,637	$ 23,925,818
Cost of sales	4,450,528	4,808,629	13,845,110	14,865,805
Gross profit	2,619,764	2,844,957	8,429,527	9,060,013
Selling, general, and administrative expenses	2,383,871	2,667,867	7,408,257	8,049,134
Research and development expenses	271,735	361,912	812,382	1,131,120
Operating income (loss)	(35,842)	(184,822)	208,888	(120,241)
Other income (expense):
Interest income	225	98	672	15,613
Interest expense	(64,242)	(65,068)	(197,123)	(194,659)
Other income, net	4,462	4,352	18,701	20,097
Net other income (expense)	(59,555)	(60,618)	(177,750)	(158,949)
Income (loss) before income taxes	(95,397)	(245,440)	31,138	(279,190)
Income tax benefit (provision)	34,276	127,877	(2,420)	139,701
Net income (loss)	$ (61,121)	$ (117,563)	$ 28,718	$ (139,489)
Basic and diluted net income (loss) per common share	$ (0.02)	$ (0.05)	$ 0.01	$ (0.05)
Weighted-average common shares outstanding:
Basic	2,511,348	2,559,644	2,529,067	2,570,189
Diluted	2,511,348	2,559,644	2,529,619	2,570,189