Stockholders' Equity - Additional Information (Parenthetical) (Detail) - shares		3 Months Ended
	Jan. 30, 2015	Mar. 31, 2015
Common Stock [Member] | CECEP Solar Energy Hong Kong Co., Limited [Member]
Schedule of Stockholders Equity Details [Line Items]
Stock Issued During Period, Shares, Acquisitions	5,722,977
Restricted Stock [Member]
Schedule of Stockholders Equity Details [Line Items]
Stock exercised during period, shares		19,200,000