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BASIS OF PRESENTATION AND LIQUIDITY (Details) (USD $)
 12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
BASIS OF PRESENTATION AND LIQUIDITY        
Net income (loss) $ (34,385,000) $ 13,387,000 $ (65,129,000)  
Net cash outflows from operations 25,618,000 41,717,000 92,182,000  
Cash and cash equivalents        
Cash and cash equivalents 179,584,000 301,626,000 351,507,000 265,843,000
Accumulated deficit 1,153,301,000 1,118,916,000    
Subsidiaries | China
        
Cash and cash equivalents        
Cash and cash equivalents 49,300,000      
Accumulated deficit $ 0