Revenue from Contracts with Customers (Tables)

9 Months Ended

Sep. 30, 2018

Revenue from Contract with Customer [Abstract]

Schedule of disaggregation of revenue

The following table summarizes revenue by revenue source and reportable segment as follows:

	Three Months Ended September 30, 2018						Nine Months Ended September 30, 2018
Major Products/Service Lines (in thousands)	U.S.		International		Total		U.S.		International		Total
Product revenue, net(1)	$	70,255	$	18,069	$	88,324	$	215,829	$	39,567	$	255,396
License and royalty revenues	—		576		576		—		1,707		1,707
Total revenues	$	70,255	$	18,645	$	88,900	$	215,829	$	41,274	$	257,103

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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.

Schedule of contract liabilities

The following table summarizes activity for reserves relating to rebate and allowances (including group purchasing organization administrative fees and returns) for the nine months ended September 30, 2018:

(in thousands)	Rebates and Allowances
Balance, January 1, 2018	$	2,860
Provision related to current period revenues	9,609
Adjustments relating to prior period revenues	(291		)
Payments or credits made during the period	(7,885		)
Balance, September 30, 2018	$	4,293

The Company recognized certain revenues as follows:

(in thousands)	Three Months Ended September 30, 2018		Nine Months Ended September 30, 2018
Amounts included in the contract liability at the beginning of the period	$	8	$	25
Performance obligations satisfied (or partially satisfied) in previous periods	$	—	$	—