CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)	3 Months Ended		6 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013
Income Statement [Abstract]
Revenues	$ 1,691,100	$ 1,747,800	$ 3,353,200	$ 3,183,900
Cost of sales	1,081,700	929,700	2,163,900	1,771,600
Gross profit	609,400	818,100	1,189,300	1,412,300
Operating expenses:
General & administrative	446,400	342,900	852,600	645,900
Selling	229,400	207,900	524,700	404,900
Research & development	116,100	90,800	223,200	188,000
Total operating expenses	791,900	641,600	1,600,500	1,238,800
Income (loss) from operations	(182,500)	176,500	(411,200)	173,500
Other income (expense):
Investment income	7,400	5,400	9,600	8,500
Other	(5,900)	2,200	(1,100)	5,900
Interest expense	(1,400)	(1,000)	(2,700)	(1,800)
Total other income, net	100	6,600	5,800	12,600
Income (loss) before income tax expense (benefit)	(182,400)	183,100	(405,400)	186,100
Income tax expense (benefit):
Current	(33,800)	44,800	(91,000)	41,700
Deferred	(10,600)	3,200	(15,100)	7,200
Total income tax expense (benefit)	(44,400)	48,000	(106,100)	48,900
Net income (loss)	$ (138,000)	$ 135,100	$ (299,300)	$ 137,200
Basic earnings (loss) per common share	$ (0.09)	$ 0.10	$ (0.20)	$ 0.10
Diluted earnings (loss) per common share	$ (0.09)	$ 0.10	$ (0.20)	$ 0.10
Cash dividends declared per common share	$ 0.00	$ 0.00	$ 0.00	$ 0.08