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CONDENSED STATEMENTS OF OPERATIONS (USD $)
 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
CONDENSED STATEMENTS OF OPERATIONS    
Sales, net $ 7,173,112 $ 7,429,984
Cost of sales    
Cost of manufactured product 3,840,094 4,053,401
Royalty expense to shareholders 556,965 536,451
Total cost of sales 4,397,059 4,589,852
Gross profit 2,776,053 2,840,132
Operating expenses:    
Sales and marketing 1,063,287 892,644
Research and development 180,848 191,512
General and administrative 2,898,952 2,401,351
Total operating expenses 4,143,087 3,485,507
Loss from operations (1,367,034) (645,375)
Interest and other income 11,440 11,530
Interest expense, net (52,063) (72,093)
Loss before income taxes (1,407,657) (705,938)
Provision for income taxes 1,876 8,491
Net loss (1,409,533) (714,429)
Preferred stock dividend requirements (229,068) (229,527)
Loss applicable to common shareholders $ (1,638,601) $ (943,956)
Basic loss per share (in dollars per share) $ (0.06) $ (0.04)
Diluted loss per share (in dollars per share) $ (0.06) $ (0.04)
Weighted average common shares outstanding:    
Basic (in shares) 27,238,495 25,318,700
Diluted (in shares) 27,238,495 25,318,700