ACCOUNTS RECEIVABLE AND RESERVES FOR PRODUCT SALES (Tables)

12 Months Ended

Dec. 31, 2017

Receivables Net Current [Abstract]

Summary of Components of Accounts Receivable

The following table summarizes the components of the Company’s accounts receivable for the periods indicated:

	As of December 31,
	2017		2016
	(in thousands)
Product sales, net of discounts and allowances	$	28,539	$	4,002
Government contract receivables		929		1,226
Total accounts receivable	$	29,468	$	5,228

Summary of Change in Reserves for Discounts and Allowances

The following table summarizes an analysis of the change in reserves for discounts and allowances for the periods indicated:

	Chargebacks			Rebates			Prompt Pay			Other Accruals			Total
	(in thousands)
Balance, as of December 31, 2016	$	1		$	238		$	—		$	67		$	306
Provision		6,455			7,659			469			1,293			15,876
Payments/credits		(5,461	)		(938	)		(300	)		(896	)		(7,595	)
Balance, as of December 31, 2017	$	995		$	6,959		$	169		$	464		$	8,587

Summary of Total Reserves Included in Consolidated Balance Sheets

The following table summarizes the total reserves above included in the Company’s consolidated balance sheets for the periods indicated:

	As of December 31,
	2017		2016
	(in thousands)
Reduction to accounts receivable	$	1,285	$	1
Component of accrued expenses		7,302		305
Total reserves	$	8,587	$	306