Exhibit 12.1

RATIO OF EARNINGS TO FIXED CHARGES

The following table contains our ratio of earnings to fixed charges for the periods indicated. You should read these ratios in connection with our consolidated financial statements, including the notes to those statements, incorporated by reference herein.

	Nine months ended September 30, 2012			Year ended December 31,
				2011			2010			2009			2008		2007
Earnings:
Income (loss) before income taxes		(8	)		(11,698	)		(8,644	)		(8,833	)		2,728		(9,046	)
Add: Fixed charges		3,083			4,508			5,406			4,183			5,747		8,527
Earnings		3,075			(7,190	)		(3,238	)		(4,650	)		8,475		(519	)
Fixed charges:
Interest expense		2,590			3,388			4,926			3,963			5,747		8,527
Amortization of capitalized expenses related to indebtedness		493			1,120			480			220			—		—
Fixed charges		3,083			4,508			5,406			4,183			5,747		8,527
Ratio of earnings to fixed charges(1)(2)		1.0			(1.6	)		(0.6	)		(1.1	)		1.5		(0.1	)
Deficiency		—			11,698			8,644			8,833			—		9,046

(1) For purposes of determining the ratios of earnings to fixed charges, earnings are defined as net income before income taxes plus fixed charges. Fixed charges consist of interest expenses and amortization of capitalized expenses related to indebtedness.

(2) Deficiencies for the years ended December 31, 2011, 2010, 2009 and 2007 were $11.7 million, $8.6 million, $8.8 million and $9.0 million, respectively.