Convertible Notes , Other Debts And Capital Leases - Other Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands		Sep. 28, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Financing from French government agencies related to various government incentive programs (1)	[1]	$ 19,443	$ 20,565
Term loans		1,018	1,282
Obligations under capital leases		371	1,099
Total debt obligations		20,832	22,946
Less: current portion		(7,677)	(7,610)
Long-term portion		$ 13,155	$ 15,336

[1] As of September 28, 2018 and December 31, 2017, loans backed by French R&D tax credit receivables were $17.0 million and $17.7 million, respectively. As of September 28, 2018, the TVN French Subsidiary had an aggregate of $25.6 million of R&D tax credit receivables from the French government from 2018 through 2022. See Note 6, “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 2019 through 2021. The remaining loans of $2.4 million at September 28, 2018, 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.