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CONDENSED STATEMENTS OF OPERATIONS (USD $)
 3 Months Ended 6 Months Ended
Jun. 30, 2014
Jun. 30, 2013
Jun. 30, 2014
Jun. 30, 2013
CONDENSED STATEMENTS OF OPERATIONS        
Sales, net $ 6,876,362 $ 6,907,233 $ 12,916,740 $ 14,080,345
Cost of sales        
Cost of manufactured product 4,097,143 4,600,227 7,917,927 8,440,321
Royalty expense to shareholders 601,295 567,544 1,097,537 1,124,509
Total cost of sales 4,698,438 5,167,771 9,015,464 9,564,830
Gross profit 2,177,924 1,739,462 3,901,276 4,515,515
Operating expenses:        
Sales and marketing 1,062,825 1,079,736 2,159,519 2,143,023
Research and development 192,237 199,385 376,961 380,233
General and administrative 2,263,211 2,845,720 4,694,889 5,744,672
Total operating expenses 3,518,273 4,124,841 7,231,369 8,267,928
Loss from operations (1,340,349) (2,385,379) (3,330,093) (3,752,413)
Interest and other income 8,436 9,158 18,832 20,598
Interest expense, net (56,035) (60,640) (113,203) (112,703)
Loss before income taxes (1,387,948) (2,436,861) (3,424,464) (3,844,518)
Provision for income taxes 1,875 1,875 3,751 3,751
Net loss (1,389,823) (2,438,736) (3,428,215) (3,848,269)
Preferred stock dividend requirements (228,999) (228,999) (457,998) (458,067)
Loss applicable to common shareholders $ (1,618,822) $ (2,667,735) $ (3,886,213) $ (4,306,336)
Basic loss per share (in dollars per share) $ (0.06) $ (0.10) $ (0.14) $ (0.16)
Diluted loss per share (in dollars per share) $ (0.06) $ (0.10) $ (0.14) $ (0.16)
Weighted average common shares outstanding:        
Basic (in shares) 27,332,483 27,042,370 27,295,586 27,140,433
Diluted (in shares) 27,332,483 27,042,370 27,295,586 27,140,433