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CONDENSED BALANCE SHEETS (USD $)
Mar. 31, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 25,586,180 $ 25,673,263
Accounts receivable, net 3,842,382 3,576,411
Inventories, net 5,504,793 6,237,419
Income taxes receivable 73,690 39,485
Other current assets 278,656 218,529
Total current assets 35,285,701 35,745,107
Property, plant, and equipment, net 12,388,292 12,653,856
Intangible and other assets, net 352,020 362,976
Total assets 48,026,013 48,761,939
Current liabilities:    
Accounts payable 2,735,985 3,500,301
Current portion of long-term debt 519,186 620,472
Accrued compensation 523,599 628,794
Accrued royalties to shareholders 558,690 122,239
Other accrued liabilities 1,670,406 1,065,943
Income taxes payable 14,766 29,471
Total current liabilities 6,022,632 5,967,220
Long-term debt, net of current maturities 4,066,358 4,143,267
Total liabilities 10,088,990 10,110,487
Commitments and contingencies - see Note 6      
Preferred stock $1 par value:    
Common stock, no par value      
Additional paid-in capital 57,284,670 57,284,670
Retained deficit (20,349,199) (19,634,770)
Total stockholders' equity 37,937,023 38,651,452
Total liabilities and stockholders' equity 48,026,013 48,761,939
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 $ 46,607 $ 46,607