Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2021

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,
	2021		2020		2019
DEFINITY	54.7	%	62.8	%	62.6	%
TechneLite	21.5	%	25.4	%	24.9	%
PYLARIFY	10.2	%	—	%	—	%

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

Property, plant and equipment, net, consisted of the following:

	December 31,
(in thousands)	2021		2020
Land	$	13,450	$	13,450
Buildings	73,559		70,381
Machinery, equipment and fixtures	83,608		77,854
Computer software	24,384		23,644
Construction in progress	10,686		11,254
	205,687		196,583
Less: accumulated depreciation and amortization	(88,915)		(76,412)
Total property, plant and equipment, net	$	116,772	$	120,171

Schedule of other (income) loss

Other loss (income) consisted of the following:

	Year Ended December 31,
(in thousands)	2021		2020		2019
Foreign currency losses (gains)	$	274	$	260	$	(33)
Tax indemnification expense (income), net	7,121		(2,218)		10,635
Interest income	(45)		(238)		(686)
Arbitration award	—		—		(3,453)
Other	—		(2)		(242)
Total other loss (income)	$	7,350	$	(2,198)	$	6,221

Schedule of recent account pronouncements

Standard	Description	Effective Date for Company	Effect on the Consolidated Financial Statements
Accounting Standards Adopted During the Year Ended December 31, 2021
ASU 2020-06, “Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging - Contracts in Entity’s Own Equity (Subtopic 815-40)”	This ASU provides guidance to simplify the complexity associated with accounting for convertible instruments and derivatives. For convertible instruments, the number of major separation models required were reduced. Consequently, more convertible debt instruments will be reported as a single liability instrument with no separate accounting for embedded conversion features. This ASU further amends the guidance for the derivatives scope exception for contracts in an entity’s own equity to reduce form-over-substance-based accounting conclusions. The ASU simplifies the diluted net income per share calculation in certain areas as well.	January 1, 2021	The adoption of this standard did not have a material impact on the Company’s consolidated financial statements.