Leases - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	$ 3,612		$ 0
Present value of lease liabilities	2,964
Current portion of operating lease liability	645		$ 0
Operating lease, payments	$ 1,480
Operating lease, weighted average remaining lease term (in years)	5 years
Operating lease, weighted average discount rate, percent	5.30%
2019 Corporate Restructuring Obligations
Lessee, Lease, Description [Line Items]
Early termination payment	$ 288
2019 French Restructuring Obligation
Lessee, Lease, Description [Line Items]
Early termination payment	820
Operating lease, impairment loss	629
2019 French Restructuring Obligation | Restructuring costs
Lessee, Lease, Description [Line Items]
Operating lease, impairment loss	826
Operating Leases Commenced
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets	1,000
Present value of lease liabilities	$ 0
Minimum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	1 year
Maximum
Lessee, Lease, Description [Line Items]
Operating lease, term of contract	5 years
Accounting Standards Update 2016-02
Lessee, Lease, Description [Line Items]
Operating lease right-of-use assets		$ 5,046
Present value of lease liabilities		$ 5,131