Stockholders' Equity

12 Months Ended

Dec. 31, 2015

Equity [Abstract]

Stockholders' Equity

17. Stockholders’ Equity

Common Stock

     On May 8, 2013, a fund investor exercised its warrants to purchase 1,485,010 shares of the Company’s common stock for $8.0 million.

On September 6, 2013, the Company issued 3,674,565 shares of its common stock pursuant to its acquisition of the assets of Paramount Energy.

On October 21, 2013, the Company issued 3,910,000 shares of its common stock in a secondary public offering for aggregate proceeds of $174.1 million, net of underwriting discounts and offering expenses.

On December 11, 2013, the Company issued 2,751,782 shares of its common stock pursuant to its acquisition of Zep Solar.

On September 23, 2014, the Company issued 2,284,070 shares of its common stock pursuant to its acquisition of Silevo (see Note 3, Acquisitions).

Shares Reserved for Future Issuance

The Company had reserved shares of common stock for future issuance as follows (in thousands):

	As of December 31,
	2015		2014
Stock-based compensation plans:
Awards available for grant		3,517		7,919
Awards outstanding		21,891		14,979
Employee Stock Purchase Plan		1,300		1,300
Convertible senior notes outstanding		18,267		13,920
Total	$	44,975		38,118