Revenue from Contracts with Customers (Tables)

3 Months Ended

Mar. 31, 2019

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 March 31, 2019						Three Months Ended March 31, 2018
Major Products/Service Lines (in thousands)	U.S.		International		Total		U.S.		International		Total
Product revenue, net(1)	$	75,434	$	10,549	$	85,983	$	71,488	$	10,580	$	82,068
License and royalty revenues	—		527		527		—		562		562
Total revenues	$	75,434	$	11,076	$	86,510	$	71,488	$	11,142	$	82,630

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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 contract liabilities

The Company recognized certain revenues as follows:

(in thousands)	Three Months Ended March 31, 2019		Three Months Ended March 31, 2018
Amounts included in the contract liability at the beginning of the period	$	8	$	8
Performance obligations satisfied (or partially satisfied) in previous periods	$	—	$	—