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STATEMENTS OF OPERATIONS (USD $)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
STATEMENTS OF OPERATIONS      
Sales, net $ 30,785,127 $ 33,644,503 $ 32,102,296
Cost of Sales      
Costs of manufactured product 18,000,408 19,776,198 18,556,257
Royalty expense to shareholders 2,474,762 2,691,887 2,643,209
Total cost of sales 20,475,170 22,468,085 21,199,466
Gross profit 10,309,957 11,176,418 10,902,830
Operating expenses:      
Sales and marketing 4,414,339 4,220,809 3,439,535
Research and development 837,073 871,851 815,018
General and administrative 10,989,790 10,022,621 10,738,110
Total operating expenses 16,241,202 15,115,281 14,992,663
Loss from operations (5,931,245) (3,938,863) (4,089,833)
Interest and other income 38,943 46,999 62,596
Interest expense, net (230,578) (231,210) (240,484)
Litigation settlements, net     5,700,000
Income (loss) before income taxes (6,122,880) (4,123,074) 1,432,279
Provision for income taxes 90,972 9,818 13,797
Net income (loss) (6,213,852) (4,132,892) 1,418,482
Preferred Stock dividend requirements (916,065) (918,108) (964,047)
Earnings (loss) applicable to common shareholders $ (7,129,917) $ (5,051,000) $ 454,435
Basic earnings (loss) per share (in dollars per share) $ (0.26) $ (0.19) $ 0.02
Diluted earnings (loss) per share (in dollars per share) $ (0.26) $ (0.19) $ 0.02
Weighted average common shares outstanding:      
Basic (in shares) 26,999,698 26,219,728 24,171,238
Diluted (in shares) 26,999,698 26,219,728 26,354,786