CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS(UNAUDITED) (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Income Statement [Abstract]
Net sales	$ 1,876,900	$ 1,197,600	$ 3,228,600	$ 2,738,500
Cost of sales	1,046,600	707,200	1,934,000	1,644,200
Gross profit	830,300	490,400	1,294,600	1,094,300
Operating expenses:
General and administrative	309,600	335,100	589,200	626,100
Selling	191,100	160,100	347,400	349,000
Research and development	135,100	78,700	255,200	125,500
Total operating expenses	635,800	573,900	1,191,800	1,100,600
Income (loss) from operations	194,500	(83,500)	102,800	(6,300)
Other income (expense):
Investment income	3,100	3,500	5,900	7,100
Other	(1,600)	2,700	900	5,900
Interest expense	(1,300)	(1,200)	(2,700)	(1,200)
Total Other Income	200	5,000	4,100	11,800
Income (loss) before income tax expense (benefit)	194,700	(78,500)	106,900	5,500
Income tax expense (benefit):
Current	51,800	(21,800)	21,200	(500)
Deferred	4,500	(1,400)	9,500	2,000
Total income (loss) tax expense (benefit)	56,300	(23,200)	30,700	1,500
Net income (loss)	$ 138,400	$ (55,300)	$ 76,200	$ 4,000
Basic earnings (loss) per common share	$ 0.10	$ (0.04)	$ 0.06	$ 0.00
Diluted earnings (loss) per common share	$ 0.10	$ (0.04)	$ 0.06	$ 0.00
Cash dividends declared per common share	$ 0.00	$ 0.00	$ 0.03	$ 0.05