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CONDENSED BALANCE SHEETS (USD $)
Sep. 30, 2013
Dec. 31, 2012
Current assets:    
Cash and cash equivalents $ 27,271,755 $ 25,963,313
Accounts receivable, net 4,811,675 3,694,307
Inventories, net 6,112,447 4,990,253
Income taxes receivable 9,431 9,431
Other current assets 323,507 783,760
Total current assets 38,528,815 35,441,064
Property, plant and equipment, net 11,156,235 11,899,650
Intangible and other assets, net 282,283 291,444
Total assets 49,967,333 47,632,158
Current liabilities:    
Accounts payable 5,201,493 5,099,884
Litigation proceeds subject to stipulation 7,724,826  
Current portion of long-term debt 279,083 315,086
Accrued compensation 605,221 809,592
Dividends payable   57,613
Accrued royalties to shareholders 748,044 129,107
Other accrued liabilities 1,778,570 1,665,670
Income taxes payable 63,328  
Total current liabilities 16,400,565 8,076,952
Long-term debt, net of current maturities 3,625,957 3,826,210
Total liabilities 20,026,522 11,903,162
Commitments and contingencies - see Note 6      
Preferred stock $1 par value:    
Common stock, no par value      
Additional paid-in capital 58,598,790 58,617,308
Retained deficit (28,556,315) (23,767,662)
Common stock in treasury - at cost (1,096,609) (122,202)
Total stockholders' equity 29,940,811 35,728,996
Total liabilities and stockholders' equity 49,967,333 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