Revenue from Contracts with Customers (Tables)

12 Months Ended

Dec. 31, 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:

	Year Ended December 31, 2018
Major Products/Service Lines (in thousands)	U.S.		International		Total
Product revenue, net(1)	$	288,580	$	52,556	$	341,136
License and royalty revenues	—		2,238		2,238
Total revenues	$	288,580	$	54,794	$	343,374

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(1) The Company’s principal products include DEFINITY and TechneLite 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 contracts with customer

The Company recognized certain revenues as follows:

(in thousands)	Year Ended December 31, 2018
Amounts included in the contract liability at the beginning of the period	$	33
Performance obligations satisfied (or partially satisfied) in previous periods	$	—

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

(in thousands)	Rebates and Allowances
Balance, January 1, 2018	2,860
Provision related to current period revenues	13,202
Adjustments relating to prior period revenues	(361		)
Payments or credits made during the period	(11,047		)
Balance, December 31, 2018	$	4,654