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BALANCE SHEETS (USD $)
Dec. 31, 2012
Dec. 31, 2011
Current assets:    
Cash and cash equivalents $ 25,963,313 $ 25,673,263
Accounts receivable, net of allowance for doubtful accounts of $2,186,190 and $2,078,944, respectively 3,694,307 3,734,686
Inventories, net 4,990,253 6,237,419
Income taxes receivable 9,431 39,485
Other current assets 783,760 218,529
Total current assets 35,441,064 35,903,382
Property, plant, and equipment, net 11,899,650 12,653,856
Intangible and other assets, net 291,444 362,976
Total assets 47,632,158 48,920,214
Current liabilities:    
Accounts payable 5,099,884 3,658,576
Current portion of long-term debt 315,086 620,472
Accrued compensation 809,592 628,794
Dividends payable 57,613  
Accrued royalties to shareholders 129,107 122,239
Other accrued liabilities 1,665,670 1,065,943
Income taxes payable   29,471
Total current liabilities 8,076,952 6,125,495
Long-term debt, net of current maturities 3,826,210 4,143,267
Total liabilities 11,903,162 10,268,762
Commitments and contingencies - See Note 8      
Preferred Stock $1 par value:    
Common Stock, no par value; authorized: 100,000,000 shares; outstanding: 27,252,463 and 25,318,700 shares, respectively      
Additional paid-in capital 58,617,308 57,284,670
Retained deficit (23,767,662) (19,634,770)
Common stock in treasury - at cost; 67,102 and 0 shares, respectively (122,202)  
Total stockholders' equity 35,728,996 38,651,452
Total liabilities and stockholders' equity 47,632,158 48,920,214
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