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Statements of Income (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Statements of Operations [Abstract]    
NET SALES $ 16,780,262 $ 16,517,338
COST OF GOODS SOLD 10,070,852 9,713,054
GROSS PROFIT 6,709,410 6,804,284
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES 5,171,147 4,574,452
RESEARCH AND DEVELOPMENT EXPENSES 512,259 695,593
TOTAL OPERATING EXPENSES 5,683,406 5,207,045
INCOME FROM OPERATIONS 1,026,004 1,534,239
INTEREST INCOME 17,253 19,681
INCOME BEFORE INCOME TAXES 1,043,257 1,553,920
FEDERAL AND STATE INCOME TAXES (Note 2) 345,000 440,000
NET INCOME $ 698,257 $ 1,113,920
EARNINGS PER COMMON SHARE:    
Basic $ 0.35 $ 0.56
Diluted $ 0.35 $ 0.56
WEIGHTED AVERAGE COMMON SHARES:    
Basic 1,981,848 1,971,717
Diluted 1,986,041 1,973,447