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FAIR VALUE (Details) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
ASSETS    
Cash equivalents $ 30,300 $ 4,100
Recurring basis | Level 1
    
ASSETS    
Cash equivalents 30,289 5,523
Total assets 30,289 5,523
Recurring basis | Level 2
    
ASSETS    
Cash equivalents   6,799
Total assets   6,799
Recurring basis | Level 3
    
LIABILITIES    
Economic rights   1,120
Scottish Enterprise agreement 20 20
Other liabilities measured at fair value 20 20
Total liabilities 20 1,140
Recurring basis | Total
    
ASSETS    
Cash equivalents 30,289 12,322
Total assets 30,289 12,322
LIABILITIES    
Economic rights   1,120
Scottish Enterprise agreement 20 20
Other liabilities measured at fair value 20 20
Total liabilities $ 20 $ 1,140