Convertible Notes , Other Debts And Finance Leases - Other Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands		Sep. 27, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Financing from French government agencies related to various government incentive programs (1)	[1]	$ 16,607	$ 18,783
Term loans		655	914
Obligations under finance leases		84	162
Total debt obligations		17,346	19,859
Less: current portion		(6,962)	(7,175)
Long-term portion		$ 10,384	$ 12,684

[1] As of September 27, 2019 and December 31, 2018, loans backed by French R&D tax credit receivables were $14.7 million and $16.7 million, respectively. As of September 27, 2019, the TVN French Subsidiary had an aggregate of $22.3 million of R&D tax credit receivables from the French government from 2020 through 2023. See Note 8, “Balance Sheet Components” for additional information. These tax loans have a fixed rate of 0.6%, plus EURIBOR 1 month + 1.3% and mature between 2020 through 2022. The remaining loans of $1.9 million at September 27, 2019, primarily relate to financial support from French government agencies for R&D innovation projects at minimal interest rates, and these loans mature between 2019 through 2025.