Quarterly report pursuant to Section 13 or 15(d)

Net Loss Per Share Attributable to Common Stockholders (Details)

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Net Loss Per Share Attributable to Common Stockholders (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]        
Weighted Average Number of Shares Outstanding, Basic 224,309,000 220,734,000 223,710,000 217,940,000
Dilutive common stock options 0 [1] 0 [1] 0 [1] 0 [1]
Weighted Average Number of Shares Outstanding, Diluted 224,309,000 220,734,000 223,710,000 217,940,000
Basic and diluted net loss per share attributable to common stockholders $ (0.40) $ (0.46) $ (1.74) $ (1.71)
Stock options, warrants and unvested stock [Member]
       
Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items]        
Antidilutive securities excluded from computation of earnings per share 13,000,000 18,300,000 12,800,000 16,500,000
[1] Stock options and unvested stock of 13.0 million shares and 18.3 million shares for the three months ended September 30, 2014 and 2013, respectively, and 12.8 million shares and 16.5 million shares for the nine months ended September 30, 2014 and 2013, respectively, representing securities that could potentially dilute basic EPS in the future were not included in the diluted net loss per share computations because their effect would have been anti-dilutive.