QuickLinks -- Click here to rapidly navigate through this document

Exhibit 12.1

Statement Regarding the Computation of
Ratio of Earnings to Fixed Charges

			For the Year Ended December 31,											For the Six Months Ended June 30,
			2005		2006		2007		2008			2009		2009			2010
Earnings Before Fixed Charges:
	Income (loss) before income taxes			1,507,245		3,836,346		7,377,687		(2,018,843	)		738,056		(7,188,086	)		(33,137,122	)
	Add fixed charges			1,008,161		5,714,414		17,207,944		33,680,606			25,159,653		11,710,691			12,523,625
		Income (loss) before fixed charges		2,515,406		9,550,760		24,585,631		31,661,763			25,897,709		4,522,605			(20,613,497	)
Fixed Charges:
	Interest expense, net			550,796		3,751,673		10,744,547		22,383,705			18,613,301		8,935,849			10,009,303
	Estimate of interest expense within rental expense			457,365		1,962,741		6,463,397		11,296,901			6,546,351		2,774,842			2,514,322
		Total fixed charges		1,008,161		5,714,414		17,207,944		33,680,606			25,159,653		11,710,691			12,523,625
Deficiency of earnings available to cover fixed charges				—		—		—		(2,018,843	)		—		(7,188,086	)		(33,137,122	)
Ratio of earnings to fixed charges				2.50		1.67		1.43		—			1.03		—			—

QuickLinks

Exhibit 12.1