Basis of Presentation and Summary of Significant Accounting Policies (Tables)

6 Months Ended

Jun. 30, 2017

Schedule of customers representing 10% or more of revenues

The following table sets forth customers who represented 10% or more of our total revenues for the three and six months ended June 30, 2017 and 2016:



	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
AmerisourceBergen Drug Corporation	19	%	22	%	21	%	23	%
McKesson Corporation	21	%	<10	%	18	%	<10	%
Caremark LLC (Specialty Pharmacy)	—	%	10	%	—	%	10	%

Schedule of customers representing greater than 10% of accounts receivable balances

Customers which represented greater than 10% of our accounts receivable balances as of June 30, 2017 and December 31, 2016 were as follows:



	June 30, 2017		December 31, 2016
AmerisourceBergen Drug Corporation	22	%	13	%
McKesson Corporation	21	%	32	%

Analysis of product sales, allowances and accruals

Our product sales, which primarily represented revenues from Makena and Feraheme for the three and six months ended June 30, 2017 and 2016, were offset by provisions for allowances and accruals as follows (in thousands):



	Three Months Ended June 30,				Six Months Ended June 30,
	2017		2016		2017		2016
Gross product sales	$	234,354	$	176,581	$	441,078	$	328,773
Provision for product sales allowances and accruals:
Contractual adjustments	75,684		53,938		145,512		99,519
Governmental rebates	28,328		19,660		52,707		36,707
Total	104,012		73,598		198,219		136,226
Product sales, net	$	130,342	$	102,983	$	242,859	$	192,547