Consolidated Statements of Income - USD ($)	3 Months Ended		6 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2015	Dec. 31, 2014
Consolidated Statements of Income
Net sales	$ 7,474,921	$ 7,303,189	$ 14,872,118	$ 14,519,513
Cost of sales	4,797,939	4,839,578	9,684,307	9,488,330
Gross profit	2,676,982	2,463,611	5,187,811	5,031,183
Selling, general, and administrative expenses	2,469,131	2,379,720	4,824,785	4,631,349
Research and development expenses	253,868	234,674	519,229	451,500
Operating loss	(46,017)	(150,783)	(156,203)	(51,666)
Other income (expense):
Interest income	1,869	1,280	2,482	3,601
Interest expense	(77,274)	(79,736)	(157,517)	(128,029)
Other income, net	2,391	3,113	4,995	6,455
Net other expense	(73,014)	(75,343)	(150,040)	(117,973)
Loss before income taxes	(119,031)	(226,126)	(306,243)	(169,639)
Income tax (provision) benefit	(5,650)	92,583		77,020
Net loss	(124,681)	(133,543)	(306,243)	(92,619)
8% Convertible preferred stock dividend	(80,500)		(161,000)
Net loss attributable to common stockholders	$ (205,181)	$ (133,543)	$ (467,243)	$ (92,619)
Basic and diluted net loss per common share	$ (0.08)	$ (0.05)	$ (0.18)	$ (0.04)
Weighted-average common shares outstanding:
Basic	2,670,124	2,520,389	2,656,711	2,520,389
Diluted	2,670,124	2,520,389	2,656,711	2,520,389