Product Revenue (Tables)

6 Months Ended

Jun. 30, 2012

Product Revenue [Abstract]

Sales Related Deductions Activity

The following table summarizes the provisions, and credits/payments, for government rebates and chargebacks, distribution-related fees, and other sales-related deductions; such amounts were not material as of and for the six months ended June 30, 2011.

	Rebates &	Distribution- Related	Other Sales-Related
	Chargebacks	Fees	Deductions	Total
Balance as of December 31, 2011	$585	$1,451	$182	$2,218
Provision related to current period sales	6,152	17,917	2,407	26,476
Credits/payments	(1,957)	(8,314)	(1,093)	(11,364)
Balance as of June 30, 2012	$4,780	$11,054	$1,496	$17,330