Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2015

Summary of Significant Accounting Policies

Schedule of Property Plant and Equipment Useful Lives

Buildings	20 years
Building improvements	5 - 20 years
Software, machinery and equipment	1 - 15 years

Schedule of components of the calculations of basic and diluted earnings per share:

        The following table provides the components of the calculations of basic and diluted earnings per share (in thousands, except share amounts):

	Years Ended December 31,
	2015			2014			2013
Numerator:
Net loss attributable to common shareholders	$	(55,795	)	$	(88,644	)	$	(62,791	)
Denominator:
Weighted average number of common shares outstanding		176,067,231			159,228,815			76,436,408

Schedule of dilutive potential common shares

	At December 31,
	2015		2014		2013
Stock options outstanding		11,700,786		8,367,271		4,703,326
Restricted stock outstanding		204,444		473,336		650,002
Common stock warrants(1)		4,192,567		4,219,449		24,137,878
Preferred stock(2)		5,554,594		5,554,594		10,972,859
Number of dilutive potential common shares		21,652,391		18,614,650		40,464,065

(1)

In May 2011, the Company issued 7,128,563 warrants as part of an underwritten public offering. As a result of additional public offerings, and pursuant to the effect of the anti-dilution provisions of these warrants, the number of warrants increased to 22,995,365. Of the warrants issued in May 2011, 22,802,898 have been exercised as of December 31, 2015. In February 2013, the Company issued 23,637,500 warrants as part of an underwritten public offering. Of the warrants issued in February 2013, 23,637,400 were exercised prior to December 31, 2015. In January 2014, the Company issued 4,000,000 warrants as part of an underwritten public offering. Of the warrants issued in January 2014, none have been exercised as of December 31, 2015. All warrants have anti-dilution provisions.

(2)

The preferred stock amount represents the dilutive potential common shares of the Series C redeemable convertible preferred stock issued on May 16, 2013 based on the conversion price of the preferred stock as of December 31, 2015. Of the 10,431 preferred shares issued in May 2013, 5,200 had been converted to common stock as of December 31, 2015.