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CONDENSED BALANCE SHEETS (USD $)
Jun. 30, 2014
Dec. 31, 2013
Current assets:    
Cash and cash equivalents $ 22,248,428 $ 27,629,359
Restricted cash 600,000  
Accounts receivable, net 4,083,189 3,476,718
Inventories, net 5,351,402 5,735,589
Other current assets 584,202 1,065,641
Total current assets 32,867,221 37,907,307
Property, plant and equipment, net 11,281,912 10,910,172
Intangible and other assets, net 275,329 279,965
Total assets 44,424,462 49,097,444
Current liabilities:    
Accounts payable 4,806,935 5,107,778
Litigation proceeds subject to stipulation 7,724,826 7,724,826
Current portion of long-term debt 176,129 247,064
Accrued compensation 704,198 815,044
Dividends payable 57,613 57,613
Accrued royalties to shareholders 601,295 602,209
Other accrued liabilities 1,313,046 1,975,018
Income taxes payable 6,682 90,972
Total current liabilities 15,390,724 16,620,524
Long-term debt, net of current maturities 3,502,110 3,576,932
Total liabilities 18,892,834 20,197,456
Commitments and contingencies - see Note 6      
Preferred stock $1 par value:    
Common stock, no par value      
Additional paid-in capital 59,043,021 58,983,166
Retained deficit (33,409,729) (29,981,514)
Common stock in treasury - at cost (1,096,609) (1,096,609)
Total stockholders' equity 25,531,628 28,899,988
Total liabilities and stockholders' equity 44,424,462 49,097,444
Series One Convertible Class B Preferred Stock [Member]
    
Preferred stock $1 par value:    
Preferred stock 103,500 103,500
Series Two Convertible Class B Preferred Stock [Member]
    
Preferred stock $1 par value:    
Preferred stock 178,700 178,700
Series Three Convertible Class B Preferred Stock [Member]
    
Preferred stock $1 par value:    
Preferred stock 130,245 130,245
Series Four Convertible Class B Preferred Stock [Member]
    
Preferred stock $1 par value:    
Preferred stock 542,500 542,500
Series Five Convertible Class B Preferred Stock [Member]
    
Preferred stock $1 par value:    
Preferred stock $ 40,000 $ 40,000