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CONSOLIDATED STATEMENTS OF OPERATIONS (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 25, 2010
Dec. 26, 2009
Revenues:      
Net product revenues $ 125,464,687 $ 116,622,692 $ 108,118,271
Research and development revenues 5,679,908 3,763,074 6,536,486
Revenues, Total 131,144,595 120,385,766 114,654,757
Expenses:      
Cost of product revenues 82,110,464 81,224,350 75,982,694
Selling, general and administrative 18,928,996 14,837,519 14,136,482
Impairment of intangible assets and goodwill 4,999,512    
Costs and Expenses 131,913,934 115,795,797 104,266,210
(Loss) income from operations (769,339) 4,589,969 10,388,547
Other income and expense:      
Interest income 1,305,240 2,192,334 2,180,678
Other income and expense, net 93,125 77,202 728,686
Foreign currency transaction gains (losses) 12,403 (418,710) (1,005,184)
Gain on loans to KTC     1,187,937
Gain on remeasurement of investment in KTC     599,328
Gain on sales of investments 368,641 2,597,505  
Other-than-temporary impairment of marketable debt securities (150,644)   (926,630)
Gain on sales of patents 155,658 769,797 6,323,934
Nonoperating Income (Expense), Total 1,784,423 5,218,128 9,088,749
Income before benefit (provision) for income taxes, and equity (losses) earnings in unconsolidated affiliates and net (income) loss of noncontrolling interest 1,015,084 9,808,097 19,477,296
Tax benefit (provision) 3,541,000 (252,000) (690,200)
Income before equity (losses) earnings in unconsolidated affiliates and net (income) loss of noncontrolling interest 4,556,084 9,556,097 18,787,096
Equity (losses) earnings in unconsolidated affiliates (296,451) (600,299) 483,057
Net income 4,259,633 8,955,798 19,270,153
Net (income) loss attributable to the noncontrolling interest (661,706) (21,647) 173,217
Net income attributable to the controlling interest 3,597,927 8,934,151 19,443,370
Net income per share      
Basic $ 0.06 $ 0.14 $ 0.29
Diluted $ 0.06 $ 0.13 $ 0.29
Weighted average number of common shares outstanding:      
Basic 64,405,776 66,019,847 66,849,890
Diluted 65,234,212 66,711,501 67,457,751
Funded Programs
      
Expenses:      
Research and development 3,741,602 2,692,488 3,586,372
Internal
      
Expenses:      
Research and development $ 22,133,360 $ 17,041,440 $ 10,560,662