CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Income Statement [Abstract]
Revenues	$ 1,729,200	$ 1,786,300	$ 5,082,400	$ 4,970,200
Cost of sales	961,900	1,088,900	3,125,800	2,860,500
Gross profit	767,300	697,400	1,956,600	2,109,700
Operating expenses:
General & administrative	433,900	461,800	1,286,500	1,108,100
Selling	202,200	198,000	726,900	602,800
Research & development	94,500	113,800	317,700	301,900
Total operating expenses	730,600	773,600	2,331,100	2,012,800
Income (loss) from operations	36,700	(76,200)	(374,500)	96,900
Other income (expense):
Investment income	1,100	1,000	10,700	19,500
Other income	(4,600)	(3,700)	(5,700)	(7,700)
Interest expense	(1,600)	(900)	(4,300)	(2,400)
Total other income, (expense) net	(5,100)	(3,600)	700	9,400
Income (loss) before income taxes (benefit)	31,600	(79,800)	(373,800)	106,300
Income tax expense (benefit): Current	34,800	(1,400)	(56,200)	40,200
Income tax expense (benefit): Deferred	(22,200)	(18,700)	(37,300)	(11,400)
Total income (loss) tax expense (benefit)	12,600	(20,100)	(93,500)	28,800
Net income (loss)	$ 19,000	$ (59,700)	$ (280,300)	$ 77,500
Basic earnings (loss) per common share	$ 0.01	$ (0.04)	$ (0.19)	$ 0.06
Diluted earnings (loss) per common share	$ 0.01	$ (0.04)	$ (0.19)	$ 0.06
Cash dividends declared per common share	$ 0.00	$ 0.00	$ 0.00	$ 0.08