Statements of Operations - USD ($)		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Net sales		$ 13,432,220	$ 17,618,559
Cost of goods sold		9,527,143	12,221,370
GROSS PROFIT		3,905,077	5,397,189
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES	[1]	5,019,604	5,483,586
RESEARCH AND DEVELOPMENT EXPENSES	[1]	671,493	870,279
LOSS FROM OPERATIONS		(1,786,020)	(956,676)
INTEREST EXPENSE		(86,561)	(90,058)
OTHER INCOME		1,223,261	61,176
LOSS BEFORE INCOME TAXES		(649,320)	(985,558)
INCOME TAX BENEFIT		(210,000)	(172,000)
NET LOSS		$ (439,320)	$ (813,558)
LOSS PER COMMON SHARE
Basic (in dollars per share)		$ (0.22)	$ (0.41)
Diluted (in dollars per share)		$ (0.22)	$ (0.41)
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING
Basic (in shares)		1,976,354	1,980,253
Diluted (in shares)		1,976,354	1,980,253

[1] The Company does not allocate all general and administrative expenses or any research and development expenses to its operating segments for internal reporting.