Commitments and Contingencies - Narrative (Details) $ in Thousands		3 Months Ended	12 Months Ended
	Nov. 30, 2020 USD ($)	Dec. 31, 2020 USD ($) facility	Dec. 31, 2020 USD ($) lease facility	Dec. 31, 2019 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Apr. 24, 2020 USD ($)	Mar. 31, 2020 USD ($)
Lessee, Lease, Description [Line Items]
Non-cash lease expense			$ 997	$ 580
Operating lease impairment losses on right-of-use assets | lease			2
Estimated increase total assets, upon adoption		$ 903	$ 903	3,117
Number of leases entered | lease			1
Estimated increase total liabilities, upon adoption		1,432	$ 1,432	3,314
Number of leases exited | lease			6
Sublease income			$ 374
Impairment charges on right-of use assets			465	0
Revenues			15,333	$ 12,827
Revision of Prior Period, Adjustment | Calculation Error
Lessee, Lease, Description [Line Items]
Estimated increase total assets, upon adoption		195	195
Estimated increase total liabilities, upon adoption		195	195
Los Angeles Warehouse Lease
Lessee, Lease, Description [Line Items]
ROU disposal						$ 317
Lease liability disposal						$ 333
Security deposit							$ 26
Atlanta Lease
Lessee, Lease, Description [Line Items]
ROU disposal					$ 17
Lease liability disposal					$ 20
Virginia Lease
Lessee, Lease, Description [Line Items]
ROU disposal		120	120
Lease liability disposal		$ 137	$ 137
Security deposit	$ 18
Contract termination fee	$ 45
London Lease
Lessee, Lease, Description [Line Items]
ROU disposal								$ 214
Lease liability disposal								$ 197
Los Angeles
Lessee, Lease, Description [Line Items]
Number of facilities | facility			3
Number of facilities occupied | facility		2	2
Number of leases exited | lease			1
Boston
Lessee, Lease, Description [Line Items]
Number of facilities | facility			1
Impairment charges on right-of use assets			$ 195
Dallas
Lessee, Lease, Description [Line Items]
Number of facilities | facility			1
Munich
Lessee, Lease, Description [Line Items]
Number of facilities | facility			1
Impairment charges on right-of use assets			$ 270
City Of Industry, CA
Lessee, Lease, Description [Line Items]
Term of contract		18 months	18 months
Estimated increase total assets, upon adoption		$ 116	$ 116
Number of leases entered | lease			1
Estimated increase total liabilities, upon adoption		$ 116	$ 116
Denver
Lessee, Lease, Description [Line Items]
Number of leases exited | lease			1
New York
Lessee, Lease, Description [Line Items]
Number of leases exited | lease			1
London
Lessee, Lease, Description [Line Items]
Number of leases exited | lease			1
Altlanta
Lessee, Lease, Description [Line Items]
Number of leases exited | lease			1
Virginia
Lessee, Lease, Description [Line Items]
Number of leases exited | lease			1
Minimum
Lessee, Lease, Description [Line Items]
Term of contract		1 year	1 year
Renewal term		12 months	12 months
Maximum
Lessee, Lease, Description [Line Items]
Term of contract		3 years	3 years
Renewal term		5 years	5 years
Professional and other services | Major Customer
Lessee, Lease, Description [Line Items]
Revenues		$ 1,000
Revenue
Lessee, Lease, Description [Line Items]
Concentration risk, percentage			100.00%	100.00%
Revenue | Professional and other services | Major Customer
Lessee, Lease, Description [Line Items]
Concentration risk, percentage		9.00%