Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table summarizes revenue by revenue source for the three months ended March 31, 2018:

	Reportable Segments
Major Products/Service Lines (in thousands)	U.S.		International		Total
Product revenue, net(1)	$	71,488	$	10,580	$	82,068
License and royalty revenues	—		562		562
Total revenues	$	71,488	$	11,142	$	82,630

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(1) The Company’s principal products include DEFINITY, TechneLite and Xenon and are categorized within product revenue, net. The Company applies the same revenue recognition policies and judgments for all of its principal products.

Contract Liabilities

The following table summarizes activity for reserves relating to rebate and allowances (including group purchasing organization administrative fees and returns) for the three months ended March 31, 2018:

(in thousands)	Rebates and Allowances
Balance, January 1, 2018	$	2,860
Provision related to current period revenues	3,027
Adjustments relating to prior period revenues	(121		)
Payments or credits made during the period	(2,776		)
Balance, March 31, 2018	$	2,990

During the three months ended March 31, 2018, the Company recognized the following revenues:

(in thousands)	Amount
Remainder of amounts included in the contract liability at the beginning of the period	$	8
Performance obligations satisfied (or partially satisfied) in previous periods	$	—