Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2020

Accounting Policies [Abstract]

Allowance for Doubtful Accounts

The following is a summary of the allowance for doubtful accounts:

	Years Ended December 31,
(In thousands)	2020		2019
Beginning Balance	$	(1,919)	$	(1,597)
Bad debt expense	(1,693)		(727)
Recoveries	(300)		(481)
Write-offs	1,155		886
Ending Balance	$	(2,757)	$	(1,919)

Schedule of Intangible Assets with Finite Lives

Intangible assets with finite lives are generally amortized using the straight-line method over the following useful lives:

	Useful Lives (Years)
Acquired methodologies and technology	2 to 7
Acquired software	3
Customer relationships	3 to 7
Intellectual property	2 to 13
Panel	1 to 7
Trade Names	2 to 6
Other	6 to 8

Schedule of Other Income (Expense), Net

The following is a summary of other income (expense), net:

	Years Ended December 31,
(In thousands)	2020		2019		2018
Change in fair value of financing derivatives	$	10,287	$	5,100	$	(14,226)
Change in fair value of warrants liability	4,894		(2,411)		—
Change in fair value of interest make-whole derivative	(871)		—		—
Change in fair value of investment in equity securities	—		(2,324)		1,443
Transition services agreement income	—		534		9,029
Other	244		755		2,290
Total other income (expense), net	$	14,554	$	1,654	$	(1,464)

Schedule of Common Stock Equivalents for Securities Outstanding Excluded from Earnings Per Share Calculations

The following is a summary of the Common Stock equivalents for the securities outstanding during the respective periods that have been excluded from the computation of diluted net loss per common share, as their effect would be anti-dilutive:

	Years Ended December 31,
	2020	2019	2018
Stock options, stock appreciation rights, restricted stock units, senior secured convertible notes and warrants	16,724,946	12,443,032	8,392,748