Accrued Expenses (Tables)

3 Months Ended

Mar. 31, 2013

Accrued Expenses [Abstract]

Summary of accrued expenses

	March 31, 2013		December 31, 2012
Accrued sales and marketing	$	3,964	$	3,402
Accrued compensation and benefits		3,503		10,080
Accrued manufacturing		1,150		1,351
Accrued rent obligations		1,014		1,103
Other		3,720		2,882
Total accrued expenses	$	13,351	$	18,818