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FAIR VALUE (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2013 | Dec. 31, 2012
--- | --- | ---
ASSETS |  |
Cash equivalents | $ 8,200 | $ 4,100
Recurring basis | Level 1 |  |
ASSETS |  |
Cash equivalents | 3,876 | 5,523
Total assets | 3,876 | 5,523
Recurring basis | Level 2 |  |
ASSETS |  |
Cash equivalents | 4,299 | 6,799
Total assets | 4,299 | 6,799
LIABILITIES |  |
Economic rights | 550 |
Total liabilities | 550 |
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 | 8,175 | 12,322
Total assets | 8,175 | 12,322
LIABILITIES |  |
Economic rights | 550 | 1,120
Scottish Enterprise agreement | 20 | 20
Other liabilities measured at fair value | 20 | 20
Total liabilities | $ 570 | $ 1,140

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