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Summary of Operations and Significant Accounting Policies (Details 6) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2014
Dec. 31, 2013
Deferred Rent    
Deferred rent current balance $ 673 $ 2,406
Deferred rent non-current balance 7,278 2,377
Deferred rent balance $ 7,951 $ 4,783