CONDENSED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Sales, net	$ 9,863,272	$ 10,412,036	$ 25,011,066	$ 24,981,833
Cost of sales
Total cost of sales	7,067,137	7,151,698	17,287,316	17,187,504
Gross profit	2,796,135	3,260,338	7,723,750	7,794,329
Operating expenses:
Sales and marketing	1,033,295	1,220,451	3,251,231	3,472,004
Research and development	146,487	159,921	432,179	465,765
General and administrative	1,676,579	1,912,824	5,196,224	6,346,731
Total operating expenses	2,856,361	3,293,196	8,879,634	10,284,500
Loss from operations	(60,226)	(32,858)	(1,155,884)	(2,490,171)
Interest and other income	39,290	19,477	102,133	44,155
Interest expense	(42,481)	(52,962)	(136,446)	(159,053)
Loss before income taxes	(63,417)	(66,343)	(1,190,197)	(2,605,069)
Provision for income taxes		283	210	848
Net loss	(63,417)	(66,626)	(1,190,407)	(2,605,917)
Preferred stock dividend requirements	(176,249)	(176,249)	(528,747)	(528,747)
Loss applicable to common shareholders	$ (239,666)	$ (242,875)	$ (1,719,154)	$ (3,134,664)
Basic loss per share (in dollars per share)	$ (0.01)	$ (0.01)	$ (0.05)	$ (0.10)
Diluted loss per share (in dollars per share)	$ (0.01)	$ (0.01)	$ (0.05)	$ (0.10)
Weighted average common shares outstanding:
Basic (in shares)	32,666,454	32,166,454	32,666,454	31,722,010
Diluted (in shares)	32,666,454	32,166,454	32,666,454	31,722,010
Cost of manufactured product
Cost of sales
Total cost of sales	$ 6,203,842	$ 6,304,397	$ 15,112,538	$ 15,116,805
Royalty expense to shareholder
Cost of sales
Total cost of sales	$ 863,295	$ 847,301	$ 2,174,778	$ 2,070,699