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CONDENSED STATEMENTS OF OPERATIONS (USD $)
 3 Months Ended
Mar. 31, 2012
Mar. 31, 2011
Sales, net $ 7,429,984 $ 9,747,632
Cost of sales    
Cost of manufactured product 4,053,401 5,759,837
Royalty expense to shareholders 536,451 697,288
Total cost of sales 4,589,852 6,457,125
Gross profit 2,840,132 3,290,507
Operating expenses:    
Sales and marketing 892,644 758,377
Research and development 191,512 190,280
General and administrative 2,401,351 2,441,755
Total operating expenses 3,485,507 3,390,412
Loss from operations (645,375) (99,905)
Interest and other income 11,530 15,977
Interest expense, net (72,093) (56,933)
Litigation settlements, net   1,900,000
Income (loss) before income taxes (705,938) 1,759,139
Provision (benefit) for income taxes 8,491 35,182
Net income (loss) (714,429) 1,723,957
Preferred stock dividend requirements (229,527) (342,217)
Earnings (loss) applicable to common shareholders $ (943,956) $ 1,381,740
Basic earnings (loss) per share (in dollars per share) $ (0.04) $ 0.06
Diluted earnings (loss) per share (in dollars per share) $ (0.04) $ 0.05
Weighted average common shares outstanding:    
Basic (in shares) 25,318,700 23,986,114
Diluted (in shares) 25,318,700 26,664,597