Quarterly report pursuant to Section 13 or 15(d)

Basic and Diluted Net Loss per Common Share - Additional Information (Details)

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Basic and Diluted Net Loss per Common Share - Additional Information (Details)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2015
Mar. 31, 2014
Earnings Per Share [Abstract]    
Potentially dilutive securities of common stock 43.3us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount 2.8us-gaap_AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount