Exhibit 12.1

STATEMENT REGARDING COMPUTATION OF RATIO OF EARNINGS TO FIXED CHARGES AND

RATIO OF EARNINGS TO COMBINED FIXED CHARGES AND PREFERRED STOCK DIVIDENDS

(in thousands, except ratios)

The following table sets forth our ratio of earnings to fixed charges and our ratio of earnings to combined fixed charges and preferred stock dividends for the years ended December 31, 2015, 2014, 2013, 2012 and 2011. As the ratios of earnings to fixed charges and earnings to combined fixed charges and preferred stock dividends indicate less than one-to-one coverage for the years ended December 31, 2015, 2014, 2013, 2012 and 2011, we have provided the coverage deficiency amounts for those periods. Earnings are the sum of (i) loss from continuing operations before losses from equity affiliates, and (ii) fixed charges, less (i) interest capitalized. Fixed charges are the sum of (i) interest expensed and capitalized, (ii) amortization of capitalized expenses related to indebtedness, and (iii) estimate of interest within rental expense.

	Year Ended December 31,
	2015			2014			2013			2012			2011
Loss from continuing operations before income taxes	$	(59,539	)	$	(38,560	)	$	(43,119	)	$	(15,675	)	$	(16,839	)
Plus: Fixed charges		1,777			686			429			670			1,110
Less: Interest capitalized		55			85			123			624			1,039
Earnings, as adjusted	$	(57,817	)	$	(37,959	)	$	(42,813	)	$	(15,629	)	$	(16,768	)
Fixed charges		1,777			686			429			670			1,110
Total fixed charges	$	1,777		$	686		$	429		$	670		$	1,110
Ratio of earnings to fixed charges		—			—			—			—			—
Ratio of earnings to combined fixed charges and preferred stock dividends		—			—			—			—			—
Deficiency of earnings available to cover fixed charges		(56,040	)		(37,273	)		(42,384	)		(14,959	)		(15,658	)
Deficiency of earnings available to cover fixed charges and preferred stock dividends	$	(56,040	)	$	(37,273	)	$	(42,384	)	$	(14,959	)	$	(15,658	)