Fair Value Measurements - Schedule of Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Liabilities:
Contingent consideration liability from acquisitions	$ 0	$ 2,595
Fair Value, Measurements, Recurring
Assets:
Total	185,341	93,303
Liabilities:
Contingent consideration liability from acquisitions	306	2,595
Total	306	2,595
Fair Value, Measurements, Recurring | Money market accounts
Assets:
Money market accounts	185,341	93,303
Fair Value, Measurements, Recurring | Level 1
Assets:
Total	185,341	93,303
Liabilities:
Contingent consideration liability from acquisitions	0	0
Total	0	0
Fair Value, Measurements, Recurring | Level 1 | Money market accounts
Assets:
Money market accounts	185,341	93,303
Fair Value, Measurements, Recurring | Level 2
Assets:
Total	0	0
Liabilities:
Contingent consideration liability from acquisitions	0	0
Total	0	0
Fair Value, Measurements, Recurring | Level 2 | Money market accounts
Assets:
Money market accounts	0	0
Fair Value, Measurements, Recurring | Level 3
Assets:
Total	0	0
Liabilities:
Contingent consideration liability from acquisitions	306	2,595
Total	306	2,595
Fair Value, Measurements, Recurring | Level 3 | Money market accounts
Assets:
Money market accounts	$ 0	$ 0