CONDENSED STATEMENTS OF OPERATIONS - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
CONDENSED STATEMENTS OF OPERATIONS
NET SALES	$ 3,984,100	$ 4,607,501	$ 12,298,453	$ 12,817,289
COST OF GOODS SOLD	2,660,149	2,940,027	8,441,010	8,330,930
GROSS PROFIT	1,323,951	1,667,474	3,857,443	4,486,359
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	1,305,455	1,357,605	4,209,705	4,121,891
RESEARCH AND DEVELOPMENT EXPENSES	168,686	150,176	519,160	475,165
INCOME (LOSS) FROM OPERATIONS	(150,190)	159,693	(871,422)	(110,697)
INTEREST EXPENSE	(20,832)	(21,721)	(62,475)	(36,720)
OTHER	6,309	4,519	17,364	6,681
INCOME (LOSS) BEFORE INCOME TAXES	(164,713)	142,491	(916,533)	(140,736)
INCOME TAX EXPENSE (BENEFIT)	(53,760)	60,225	(321,617)	(69,415)
NET INCOME (LOSS)	$ (110,953)	$ 82,266	$ (594,916)	$ (71,321)
INCOME (LOSS) PER COMMON SHARE:
Basic (in dollars per share)	$ (0.06)	$ 0.04	$ (0.30)	$ (0.04)
Diluted (in dollars per share)	$ (0.06)	$ 0.04	$ (0.30)	$ (0.04)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING:
Basic (in shares)	2,005,096	2,018,753	2,014,055	2,018,614
Diluted (in shares)	2,005,096	2,018,842	2,014,055	2,018,614