Operating Leases and Right-of-Use Assets-- Narrative (Details) € in Thousands, $ in Thousands	1 Months Ended		12 Months Ended
	Jun. 30, 2021 USD ($)	Jun. 30, 2021 EUR (€)	Dec. 31, 2021 USD ($) lease facility	Dec. 31, 2020 USD ($) lease	Dec. 31, 2019 USD ($)
Lessee, Lease, Description [Line Items]
Non-cash lease expense			$ 778	$ 997
Number of leases entered | lease			1	1
Number of lease modified | lease			1
Number of leases exited | lease			2	6
Number leases, impairments | lease				2
Impairment charges - right-of use assets			$ 0	$ 465
Operating lease, right-of-use asset, net			659	903	$ 3,117
Operating lease liability			(920)	(1,134)
Total operating lease liabilities			$ 728	$ 1,432	$ 3,314
Los Angeles
Lessee, Lease, Description [Line Items]
Number of facilities | facility			3
Number of facilities occupied | facility			2
Dallas
Lessee, Lease, Description [Line Items]
Number of facilities | facility			1
Austin, Texas
Lessee, Lease, Description [Line Items]
Number of facilities | facility			1
Number of leases entered | lease			1
Operating lease, right-of-use asset, net			$ 60
Term of contract			12 months
Total operating lease liabilities			$ 60
Los Atlos
Lessee, Lease, Description [Line Items]
Number of leases exited | lease			1
Munich
Lessee, Lease, Description [Line Items]
Total operating lease liabilities | €		€ 316
Contract termination Fee | €		125
Termination of lease	$ 227	€ 191