Fair Value Measurements - Summary of Financial Assets Measured at Fair Value (Details) - Recurring - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Fair Value Measurements
Contingent consideration, current	$ 2,500	$ 2,441
Contingent consideration, non-current	2,352	2,336
Total liabilities	4,852	4,777
Level 1
Fair Value Measurements
Cash equivalents	174,571	174,429
Total assets	174,571	174,429
Contingent consideration, current	0	0
Contingent consideration, non-current	0	0
Total liabilities	0	0
Level 2
Fair Value Measurements
Cash equivalents	0	0
Total assets	0	0
Contingent consideration, current	0	0
Contingent consideration, non-current	0	0
Total liabilities	0	0
Level 3
Fair Value Measurements
Cash equivalents	0	0
Total assets	0	0
Contingent consideration, current	2,500	2,441
Contingent consideration, non-current	2,352	2,336
Total liabilities	4,852	4,777
Total fair value
Fair Value Measurements
Cash equivalents	174,571	174,429
Total assets	$ 174,571	$ 174,429