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Condensed Statements of Operations (Unaudited) (USD $)
3 Months Ended9 Months Ended
Sep. 30, 2011
Sep. 30, 2010
Sep. 30, 2011
Sep. 30, 2010
Condensed Statements of Operations [Abstract]    
NET SALES$ 4,361,312$ 4,141,092$ 12,601,843$ 12,073,724
COST OF GOODS SOLD2,681,5092,474,1887,601,2077,093,266
GROSS PROFIT1,679,8031,666,9045,000,6364,980,458
SELLING, GENERAL AND ADMINISTRATIVE EXPENSES1,254,0161,086,5773,865,3523,409,441
RESEARCH AND DEVELOPMENT EXPENSES129,541163,420366,940528,622
INCOME FROM OPERATIONS296,246416,907768,3441,042,395
INTEREST INCOME4,0286,26713,37113,672
INCOME BEFORE INCOME TAXES300,274423,174781,7151,056,067
INCOME TAX EXPENSE85,597135,831220,150277,111
NET INCOME$ 214,677$ 287,343$ 561,565$ 778,956
EARNINGS PER COMMON SHARE:    
Basic$ 0.11$ 0.15$ 0.28$ 0.40
Diluted$ 0.11$ 0.15$ 0.28$ 0.39
WEIGHTED AVERAGE COMMON SHARES OUTSTANDING :    
Basic1,983,6131,974,1621,981,0281,971,248
Diluted1,987,9451,975,8821,985,2631,972,351