Fair Value Measurements - Schedule of Fair Value Measurements, Liabilities Measured on a Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Warrant liability	$ 13	$ 13
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	17,812	17,260
Contingent earnout shares	35,867	33,069
Warrant liability	13	13
Total	53,692	50,342
Fair Value, Recurring | Quoted Prices in Active Markets for Identical Assets (Level 1)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	0	0
Contingent earnout shares	0	0
Warrant liability	0	0
Total	0	0
Fair Value, Recurring | Significant Other Observable Inputs (Level 2)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	0	0
Contingent earnout shares	35,867	33,069
Warrant liability	13	13
Total	35,880	33,082
Fair Value, Recurring | Significant Unobservable Inputs (Level 3)
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration	17,812	17,260
Contingent earnout shares	0	0
Warrant liability	0	0
Total	$ 17,812	$ 17,260