Convertible Notes, Debts and Finance Leases (Details) - USD ($) $ in Thousands		Dec. 31, 2020	Dec. 31, 2019
Debt Disclosure [Abstract]
Financing from French government agencies related to various government incentive programs (1)	[1]	$ 14,974	$ 16,566
Relief loans (2)	[2]	6,694
Term loans		167	587
Obligations under finance leases		22	71
Total debt obligations		21,857	17,224
Less: current portion		(11,771)	(6,713)
Long-term portion		$ 10,086	$ 10,511

[1] Loans backed by French R&D tax credit receivables were $13.6 million and $15.1 million as of December 31, 2020 and 2019, respectively. As of December 31, 2020, the French subsidiary had an aggregate of $21.5 million of R&D tax credit receivables from the French government from 2021 through 2024. These tax loans have a fixed rate of 0.6%, plus EURIBOR 1 month plus 1.3% and mature between 2021 through 2023. The remaining loans of $1.4 million and $1.5 million as of December 31, 2020 and 2019, respectively, primarily relate to financial support from French government agencies for R&D innovation projects at minimal interest rates, and the loans outstanding at December 31, 2020 mature between 2021 through 2025.

[2] Refer to the below section “Relief Loans” for the description of these loans.