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BALANCE SHEETS (USD $)
Dec. 31, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 27,629,359 $ 25,963,313
Accounts receivable, net of allowance for doubtful accounts of $1,698,506 and $2,186,190, respectively 3,476,718 3,694,307
Inventories, net 5,735,589 4,990,253
Income taxes receivable   9,431
Other current assets 1,065,641 783,760
Total current assets 37,907,307 35,441,064
Property, plant, and equipment, net 10,910,172 11,899,650
Intangible and other assets, net 279,965 291,444
Total assets 49,097,444 47,632,158
Current liabilities:    
Accounts payable 5,107,778 5,099,884
Litigation proceeds subject to stipulation 7,724,826  
Current portion of long-term debt 247,064 315,086
Accrued compensation 815,044 809,592
Dividends payable 57,613 57,613
Accrued royalties to shareholders 602,209 129,107
Other accrued liabilities 1,975,018 1,665,670
Income taxes payable 90,972  
Total current liabilities 16,620,524 8,076,952
Long-term debt, net of current maturities 3,576,932 3,826,210
Total liabilities 20,197,456 11,903,162
Commitments and contingencies - See Note 8      
Preferred Stock $1 par value:    
Common Stock, no par value; authorized: 100,000,000 shares; outstanding: 27,187,702 and 27,252,463 shares, respectively      
Additional paid-in capital 58,983,166 58,617,308
Retained deficit (29,981,514) (23,767,662)
Common stock in treasury - at cost; 722,920 and 67,102 shares, respectively (1,096,609) (122,202)
Total stockholders' equity 28,899,988 35,728,996
Total liabilities and stockholders' equity 49,097,444 47,632,158
Series I, Class B
    
Preferred Stock $1 par value:    
Preferred stock 103,500 103,500
Series II, Class B
    
Preferred Stock $1 par value:    
Preferred stock 178,700 178,700
Series III, Class B
    
Preferred Stock $1 par value:    
Preferred stock 130,245 130,245
Series IV, Class B
    
Preferred Stock $1 par value:    
Preferred stock 542,500 542,500
Series V, Class B
    
Preferred Stock $1 par value:    
Preferred stock $ 40,000 $ 46,607