Condensed Consolidated Statements of Income (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2012	Mar. 31, 2011	Mar. 31, 2012	Mar. 31, 2011
Net sales	$ 7,653,586	$ 8,383,842	$ 23,925,818	$ 24,502,477
Cost of sales	4,808,629	5,159,450	14,865,805	15,156,811
Gross profit	2,844,957	3,224,392	9,060,013	9,345,666
Selling, general, and administrative expenses	2,667,867	2,640,053	8,049,134	7,774,848
Research and development expenses	361,912	339,258	1,131,120	1,045,573
Operating income (loss)	(184,822)	245,081	(120,241)	525,245
Interest income	98	10,735	15,613	14,889
Interest expense	(65,068)	(70,964)	(194,659)	(224,431)
Other income, net	4,352	9,985	20,097	21,912
Net other income (expense)	(60,618)	(50,244)	(158,949)	(187,630)
Income (loss) before income taxes	(245,440)	194,837	(279,190)	337,615
Income tax benefit (provision)	127,877	(77,577)	139,701	(135,503)
Net income (loss)	$ (117,563)	$ 117,260	$ (139,489)	$ 202,112
Basic and diluted net income (loss) per common share	$ (0.01)	$ 0.01	$ (0.01)	$ 0.02
Basic	12,798,221	13,419,612	12,850,947	13,413,636
Diluted	12,798,221	13,457,483	12,850,947	13,428,338