Accrued Expenses (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Other Liabilities Disclosure [Abstract]
Accrued data costs	$ 19,375	$ 19,593
Payroll and payroll-related	14,653	15,412
Accrued interest on senior secured convertible notes	0	6,120
Professional fees	4,848	4,118
Other	9,504	10,264
Total accrued expenses	$ 48,380	$ 55,507