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COMMITMENTS AND CONTINGENCIES (Details) (USD $) | 12 Months Ended
--- | ---
Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
COMMITMENTS AND CONTINGENCIES. |  |  |
Restricted cash related to security deposit | $ 200,000 | $ 200,000 |
Obligations for base rent and CAM costs under facility and other non-cancelable operating leases |  |  |
2013 | 2,590,000 |  |
2014 | 2,303,000 |  |
2015 | 2,362,000 |  |
2016 | 2,374,000 |  |
2017 | 1,221,000 |  |
Total minimum lease payments | 10,850,000 |  |
Total rent and CAM expense | $ 2,500,000 | $ 2,500,000 | $ 2,500,000

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