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Consolidated Statements of Comprehensive Loss (USD $)
In Thousands, unless otherwise specified
3 Months Ended 6 Months Ended
Jun. 30, 2013
Jun. 30, 2012
Jun. 30, 2013
Jun. 30, 2012
Net loss $ (1,180) $ (2,704) $ (4,453) $ (6,317)
Other comprehensive income / (loss):        
Unrealized gain / (loss) on securities 149 (163) 73 (186)
Other comprehensive income / (loss) 149 (163) 73 (186)
Total comprehensive loss $ (1,031) $ (2,867) $ (4,380) $ (6,503)