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CONDENSED BALANCE SHEETS (USD $)
Jun. 30, 2011
Dec. 31, 2010
Current assets:    
Cash and cash equivalents $ 26,790,307 $ 23,266,039
Accounts receivable, net 4,288,459 7,582,062
Inventories, net 8,084,255 8,682,191
Income taxes receivable 11,973 12,031
Other current assets 214,490 681,244
Total current assets 39,389,484 40,223,567
Property, plant, and equipment, net 12,720,061 12,560,592
Intangible and other assets, net 385,190 406,910
Total assets 52,494,735 53,191,069
Current liabilities:    
Accounts payable 3,301,597 3,847,966
Current portion of long-term debt 643,544 519,611
Accrued compensation 600,704 603,484
Dividends payable 291,700  
Accrued royalties to shareholders 733,965 949,619
Other accrued liabilities 1,393,489 3,910,428
Income taxes payable 77,466 155,000
Total current liabilities 7,042,465 9,986,108
Long-term debt, net of current maturities 4,235,362 4,304,460
Total liabilities 11,277,827 14,290,568
Commitments and contingencies - see Note 6    
Preferred stock $1 par value:    
Common stock, no par value    
Additional paid-in capital 57,420,315 57,674,737
Retained deficit (18,482,423) (21,053,252)
Total stockholders' equity 41,216,908 38,900,501
Total liabilities and stockholders' equity 52,494,735 53,191,069
Series I, Class B
    
Preferred stock $1 par value:    
Preferred stock 144,000 144,000
Series II, Class B
    
Preferred stock $1 par value:    
Preferred stock 219,700 219,700
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 552,500 552,500
Series V, Class B
    
Preferred stock $1 par value:    
Preferred stock $ 1,232,571 $ 1,232,571