Product Revenue (Tables)

3 Months Ended

Mar. 31, 2012

Product Revenue [Abstract]

Sales Related Deductions Activity

The following table summarizes the provisions, and credits/payments, for government rebates and chargebacks, and distribution-related fees recorded for the three months ended March 31, 2012; such amounts were not material for the three months ended March 31, 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	2,386	6,965	761	10,112
Credits/payments	(161)	(2,907)	(495)	(3,563)
Balance as of March 31, 2012	$2,810	$5,509	$448	$8,767