Product Revenue (Tables)

3 Months Ended

Mar. 31, 2013

Product Revenue

Product revenue for the period

	Three Months Ended March 31,
	2013			2012
	(In thousands)
Product revenue, gross	$	65,459		$	—
Government rebates, chargebacks and other	1,651			—
Returns reserves and distribution fees	(3,102		)	—
Product revenue, net	$	64,008		$	—

Schedule of reserve established for Kyprolis

	Chargebacks			Rebates and Other			Distribution Fees and Returns			Total
	(In thousands)
Balance as of December 31, 2012	$	5,707		$	1,946		$	2,286		$	9,939
Provision related to current period sales	3,919			317			3,102			7,338
Credits/ Payments	(4,415		)	(51		)	(3,333		)	(7,799		)
Other	(5,087		)	(800		)	—			(5,887		)
Balance as of March 31, 2013	$	124		$	1,412		$	2,055		$	3,591