CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012
Income Statement [Abstract]
Net sales	$ 1,436,100	$ 1,351,700
Cost of sales	841,900	887,300
Gross profit	594,200	464,400
Operating expenses:
General and administrative	303,000	279,600
Selling	197,000	156,400
Research and development	97,200	120,100
Total operating expenses	597,200	556,100
Loss from operations	(3,000)	(91,700)
Other income (expense):
Investment income	3,100	2,900
Other income	3,700	2,500
Interest expense	(800)	(1,400)
Total other income, net	6,000	4,000
Income (loss) before income tax expense (benefit)	3,000	(87,700)
Income tax expense (benefit): Current	(3,100)	(30,600)
Deferred	4,000	5,100
Total income tax expense (benefit)	900	(25,500)
Net income (loss)	$ 2,100	$ (62,200)
Basic earnings (loss) per common share	$ 0	$ (0.05)
Diluted earnings (loss) per common share	$ 0	$ (0.05)
Cash dividends declared	$ 0.08	$ 0.03