Exhibit 12.1

Statement of Computation of Ratio of Earnings to Fixed Charges

(in thousands)

	For the six months ended						For the years ended
	June 30,						December 31,
	2016			2015			2015			2014			2013			2012			2011
Loss before taxes	$	(2,450	)	$	(10,288	)	$	(12,936	)	$	(25,089	)	$	(34,449	)	$	(40,884	)	$	(12,661	)
Fixed charges:
Interest expense (a)	276			320			515			1,242			1,220			1,722			1,870
Rentals:
Buildings, net of sublease income - 6.0% (b)	68			93			155			218			245			324			288
Total fixed charges	344			413			670			1,460			1,465			2,046			2,158
Loss before taxes and discontinued operations, plus fixed charges	(2,106		)	(9,875		)	(12,266		)	(23,629		)	(32,984		)	(38,838		)	(10,503		)
Ratio of earnings to fixed charges (c)	—			—			—			—			—			—			—
Deficit	$	(2,450	)	$	(10,288	)	$	(12,936	)	$	(25,089	)	$	(34,449	)	$	(40,884	)	$	(12,661	)

(a) Amortization of the discount on the Company's subordinated notes is included in interest expense.

(b) Management believes that 6.0% is a reasonable approximation of the interest factor on rentals. Building and office rental fees that were included in restructuring charges were excluded from fixed charges.

(c) The earnings to fixed charges ratio was less than 1:1 due to losses reported for the six months ended June 30, 2016 and 2015 and for the years ended December 31, 2015, 2014, 2013, 2012 and 2011

.