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CONDENSED BALANCE SHEETS (USD $)
Jun. 30, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 22,903,735 $ 25,673,263
Accounts receivable, net 6,740,709 3,576,411
Inventories, net 5,016,383 6,237,419
Income taxes receivable 69,878 39,485
Other current assets 186,300 218,529
Total current assets 34,917,005 35,745,107
Property, plant, and equipment, net 12,166,738 12,653,856
Intangible and other assets, net 340,902 362,976
Total assets 47,424,645 48,761,939
Current liabilities:    
Accounts payable 2,833,883 3,500,301
Current portion of long-term debt 415,889 620,472
Accrued compensation 660,281 628,794
Accrued royalties to shareholders 654,187 122,239
Other accrued liabilities 1,519,701 1,065,943
Income taxes payable 18,695 29,471
Total current liabilities 6,102,636 5,967,220
Long-term debt, net of current maturities 3,989,616 4,143,267
Total liabilities 10,092,252 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 (20,953,829) (19,634,770)
Total stockholders' equity 37,332,393 38,651,452
Total liabilities and stockholders' equity 47,424,645 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