CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Income Statement [Abstract]
Revenues	$ 1,786,300	$ 1,626,100	$ 4,970,200	$ 4,854,700
Cost of sales	1,088,900	810,700	2,860,500	2,744,700
Gross profit	697,400	815,400	2,109,700	2,110,000
Operating expenses:
General & administrative	461,800	320,800	1,108,100	910,000
Selling	198,000	188,600	602,800	536,000
Research & development	113,800	100,800	301,900	356,000
Total operating expenses	773,600	610,200	2,012,800	1,802,000
Income (loss) from operations	(76,200)	205,200	96,900	308,000
Other income (expense):
Investment income	1,000	5,700	19,500	11,600
Other	(3,700)	600	(7,700)	1,500
Interest expense	(900)	(1,100)	(2,400)	(3,800)
Total other income, (expense) net	(3,600)	5,200	9,400	9,300
Income (loss) before income taxes (benefit)	(79,800)	210,400	106,300	317,300
Income tax expense (benefit): Current	(1,400)	53,600	40,200	74,800
Income tax expense (benefit): Deferred	(18,700)	6,700	(11,400)	16,200
Total income (loss) tax expense (benefit)	(20,100)	60,300	28,800	91,000
Net income (loss)	$ (59,700)	$ 150,100	$ 77,500	$ 226,300
Basic earnings (loss) per common share	$ (0.04)	$ 0.11	$ 0.06	$ 0.17
Diluted earnings (loss) per common share	$ (0.04)	$ 0.11	$ 0.06	$ 0.17
Cash dividends declared per common share	$ 0.00	$ 0.00	$ 0.08	$ 0.03