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Net Loss Per Share of Common Stock - Calculation of Basic and Diluted Net Loss Per Share (Detail) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Numerator:
Net loss attributable to stockholders	$ (37,452)	$ (832)
Denominator:
Basic and diluted weighted-average common shares	584,519,396	198,214,456
Basic net loss per share	$ (0.06)	$ 0.00
Diluted net loss per share	$ (0.06)	$ 0.00

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.