Commitments and Contingencies - Narrative (Details) $ in Thousands	3 Months Ended
	Mar. 31, 2021 USD ($) facility	Mar. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Non-cash lease expense | $	$ 267	$ 316
Los Angeles, California
Lessee, Lease, Description [Line Items]
Number of facilities	3
Number of facilities occupied	2
Boston, Massachusetts
Lessee, Lease, Description [Line Items]
Number of facilities	1
Dallas, Texas
Lessee, Lease, Description [Line Items]
Number of facilities	1
Munich, Germany
Lessee, Lease, Description [Line Items]
Number of facilities	1
Minimum
Lessee, Lease, Description [Line Items]
Term of contract	1 year
Renewal term	12 months
Maximum
Lessee, Lease, Description [Line Items]
Term of contract	3 years
Renewal term	5 years