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Condensed Consolidated Statements of Changes in Redeemable Convertible Preferred Stock, Members' Deficit and Stockholders' Equity (Deficit) (Parenthetical) (USD $)
In Thousands, unless otherwise specified
12 Months Ended 9 Months Ended
Dec. 31, 2012
Redeemable Convertible Preferred Stock [Member]
Series G Preferred Stock [Member]
Sep. 30, 2013
Common Stock [Member]
Issuance cost on issue of convertible redeemable Series G preferred stock $ 59  
Issuance of common stock, issuance costs   $ 23