Condensed Consolidated Statements of Income (Unaudited) (USD $)	3 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Income Statement [Abstract]
Net sales	$ 1,541,000	$ 1,255,500
Cost of goods sold	937,000	746,800
Gross profit	604,000	508,700
Operating expenses:
General and administrative	290,900	286,800
Selling	189,000	140,400
Research and development	46,900	87,500
Total operating expenses	526,800	514,700
Income (loss) from operations	77,200	(6,000)
Other income:
Interest & other income, net	6,800	9,200
Income before income taxes	84,000	3,200
Income tax expense (benefit):
Current	21,200	6,600
Deferred	3,400	(5,600)
Total	24,600	1,000
Net income	$ 59,400	$ 2,200
Basic earnings per common share	$ 0.05	$ 0
Diluted earnings per common share	$ 0.05	$ 0
Cash dividends declared per common share	$ 0.05	$ 0.09