Restated Consolidated Balance Sheets (Parenthetical) (Detail) (USD $)	Sep. 30, 2014	Dec. 31, 2013		Sep. 30, 2013
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01	[1]	$ 0.01
Common stock, shares authorized	1,500,000,000	1,500,000,000	[1]	750,000,000
Common stock, issued	907,964,521	239,234,725	[1]	222,351,780
Common stock, outstanding (in shares)	907,964,521	239,234,725	[1]	222,351,780
Convertible Preferred Stock [Member]
Convertible preferred stock, par value (in dollars per share)				$ 0.01
Convertible preferred stock, shares authorized				100,000,000
Convertible preferred stock, issued				42,215,346
Convertible preferred stock, outstanding (in shares)				42,215,346

[1] For discussion on the restatement adjustments, see Note 2 - Restatement of Previously Issued Consolidated Financial Statements.