Revenue from Contracts with Customers

3 Months Ended

Mar. 31, 2019

Revenue from Contract with Customer [Abstract]

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

________________________________


(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.

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	$	—	$	—

The Company’s performance obligations are typically part of contracts that have an original expected duration of one year or less. As such, under the optional exemption provided by ASC 606-10-50-14, the Company is not disclosing the aggregate amount of the transaction price allocated to performance obligations that are unsatisfied (or partially satisfied) as of the end of the reporting period.