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CONDENSED STATEMENTS OF OPERATIONS (USD $)
 3 Months Ended 9 Months Ended
Sep. 30, 2012
Sep. 30, 2011
Sep. 30, 2012
Sep. 30, 2011
Sales, net $ 9,444,157 $ 8,270,608 $ 25,602,046 $ 25,994,211
Cost of sales        
Cost of manufactured product 5,318,351 4,208,993 14,114,956 14,175,830
Royalty expense to shareholders 772,142 672,084 1,962,780 2,002,720
Total cost of sales 6,090,493 4,881,077 16,077,736 16,178,550
Gross profit 3,353,664 3,389,531 9,524,310 9,815,661
Operating expenses:        
Sales and marketing 1,034,419 937,868 2,939,142 2,487,136
Research and development 244,015 169,279 601,008 539,161
General and administrative 2,286,614 2,308,759 7,372,663 7,903,586
Total operating expenses 3,565,048 3,415,906 10,912,813 10,929,883
Loss from operations (211,384) (26,375) (1,388,503) (1,114,222)
Interest and other income 11,286 15,322 34,199 48,920
Interest expense, net (68,994) (62,455) (211,344) (184,911)
Litigation settlements, net   1,900,000   5,700,000
Income (loss) before income taxes (269,092) 1,826,492 (1,565,648) 4,449,787
Provision (benefit) for income taxes 3,869 (1,952) 26,372 50,514
Net income (loss) (272,961) 1,828,444 (1,592,020) 4,399,273
Preferred stock dividend requirements (229,527) (342,217) (688,581) (1,026,651)
Earnings (loss) applicable to common shareholders $ (502,488) $ 1,486,227 $ (2,280,601) $ 3,372,622
Basic earnings (loss) per share (in dollars per share) $ (0.02) $ 0.06 $ (0.09) $ 0.14
Diluted earnings (loss) per share (in dollars per share) $ (0.02) $ 0.06 $ (0.09) $ 0.13
Weighted average common shares outstanding:        
Basic (in shares) 26,972,818 24,027,053 25,870,073 24,005,761
Diluted (in shares) 26,972,818 25,950,804 25,870,073 26,364,753