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Net Income (Loss) Per Share and Net Income (Loss) Attributable to Common Stockholders - Basic and Diluted Net Income (Loss) per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Net income (loss) (1)	$ 950	$ (7,371)	$ (9,564)	$ (23,857)
Basic weighted average common shares outstanding (shares)	375,982,120	59,844,394	373,605,274	57,958,838
Diluted weighted average common shares outstanding (shares)	401,934,880	59,844,394	373,605,274	57,958,838
Net income (loss) per common share:
Basic ($ per share)	$ 0.00	$ (0.12)	$ (0.03)	$ (0.41)
Diluted ($ per share)	$ 0.00	$ (0.12)	$ (0.03)	$ (0.41)

The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.