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STATEMENTS OF OPERATIONS - USD ($)
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
STATEMENTS OF OPERATIONS      
Sales, net $ 29,826,636 $ 29,552,200 $ 34,520,630
Cost of Sales      
Cost of manufactured product 16,957,073 16,509,446 19,770,226
Royalty expense to shareholders 2,527,508 2,477,583 2,728,701
Total cost of sales 19,484,581 18,987,029 22,498,927
Gross profit 10,342,055 10,565,171 12,021,703
Operating expenses:      
Sales and marketing 4,025,786 3,837,491 3,967,081
Research and development 571,842 607,527 616,784
General and administrative 8,795,310 9,328,029 9,595,399
Impairment of assets 456,119    
Total operating expenses 13,849,057 13,773,047 14,179,264
Loss from operations (3,507,002) (3,207,876) (2,157,561)
Litigation proceeds   7,724,826  
Interest and other income 26,522 24,917 33,941
Interest expense, net (213,295) (219,672) (222,808)
Income (loss) before income taxes (3,693,775) 4,322,195 (2,346,428)
Provision for income taxes 1,132 7,877 8,177
Net income (loss) (3,694,907) 4,314,318 (2,354,605)
Preferred stock dividend requirements (704,996) (709,351) (915,225)
Deemed capital contribution on extinguishment of preferred stock   2,305,678  
Income (loss) applicable to common shareholders $ (4,399,903) $ 5,910,645 $ (3,269,830)
Basic earnings (loss) per share (in dollars per share) $ (0.15) $ 0.21 $ (0.12)
Diluted earnings (loss) per share (in dollars per share) $ (0.15) $ 0.20 $ (0.12)
Weighted average common shares outstanding:      
Basic (in shares) 29,354,437 27,822,593 27,375,450
Diluted (in shares) 29,354,437 29,481,294 27,375,450