Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2018

Accounting Policies [Abstract]

Schedule of product concentration risk

The following table sets forth revenues for each of the Company’s products representing 10% or more of revenues:

	Year Ended December 31,
	2018	2017	2016
DEFINITY	53.3%	47.5%	43.6%
TechneLite	28.8%	31.6%	32.9%

Schedule of estimated useful lives of major classes of depreciable assets

The estimated useful lives of the major classes of depreciable assets are as follows:

Class	Range of Estimated Useful Lives
Buildings	10 - 50 years
Land improvements	15 - 40 years
Machinery and equipment	3 - 15 years
Furniture and fixtures	15 years
Leasehold improvements	Lesser of lease term or 15 years
Computer software	3 - 5 years

Schedule of other income

Other income consisted of the following:

	Years Ended December 31,
(in thousands)	2018			2017			2016
Foreign currency losses (gains)	$	557		$	(253	)	$	853
Tax indemnification income	(2,855		)	(8,367		)	(1,055		)
Other income	(167		)	(18		)	(18		)
Total other income	$	(2,465	)	$	(8,638	)	$	(220	)

Schedule of recent account pronouncements

Standard	Description	Effective Date for Company	Effect on the Consolidated Financial Statements
Recently Issued Accounting Standards Not Yet Adopted
ASU 2016-02, Leases (Topic 842)	This ASU supersedes existing guidance on accounting for leases in Leases (Topic 840) and generally requires all leases to be recognized on the balance sheet. The provisions of ASU 2016-02 are effective for annual reporting periods beginning after December 15, 2018; early adoption is permitted. In July 2018, an amendment was made that allows companies the option of using the effective date of the new standard as the initial application date (at the beginning of the period in which it is adopted, rather than at the beginning of the earliest comparative period).	January 1, 2019	The Company has completed its assessment on the impact of the standard, including optional practical expedients and transition methods that the Company will elect upon adoption. The implementation plan included identifying the Company’s lease population, assessing significant leases under the new guidance and identifying changes to processes and controls. The Company concluded that upon adoption of this standard there will not be a significant impact to its Balance Sheet. The Company will utilize the prospective approach of adopting this standard. The Company has identified and implemented appropriate changes to its business processes and controls to support recognition and disclosure under this standard.

Standard	Description	Effective Date for Company	Effect on the Consolidated Financial Statements
Accounting Standards Adopted During the Year Ended December 31, 2018
ASU 2017-09, Compensation—Stock Compensation (Topic 718): Scope of Modification Accounting	This ASU clarifies when to account for a change to the terms or conditions of a share-based payment award as a modification. Under the new guidance, modification accounting is required only if the fair value, vesting conditions or classification of the award (as equity or liability) changes as a result of the change in terms or conditions. The new guidance will be applied prospectively to awards modified on or after the adoption date. The guidance is effective for annual periods, and interim periods within those annual periods, beginning after December 15, 2017 for all entities.	January 1, 2018	The adoption of this standard did not have a material impact on the Company’s consolidated financial statements.
ASU 2014-09, Revenue from Contracts with Customers (Topic 606) and related amendments	This ASU and related amendments affect any entity that either enters into contracts with customers to transfer goods or services or enters into contracts for the transfer of nonfinancial assets, unless those contracts are within the scope of other standards. The guidance in this ASU supersedes the revenue recognition requirements in Topic 605, Revenue Recognition and most industry-specific guidance. The core principle of the guidance is that an entity should recognize revenue upon the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services.	January 1, 2018	See Note 3, "Revenue from Contracts with Customers" for the required disclosures related to the impact of adopting this standard. The adoption of this standard did not have a material impact on the Company’s consolidated balance sheets and statements of operations.