Annual report pursuant to Section 13 and 15(d)

Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical)

v2.4.1.9
Consolidated Statements of Stockholders' Equity (Deficit) (Parenthetical) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Statement Of Stockholders Equity [Abstract]  
Issuance of common stock, issuance cost $ 0.4us-gaap_AdjustmentsToAdditionalPaidInCapitalStockIssuedIssuanceCosts