Convertible Notes , Other Debts And Capital Leases - Other Debt and Capital Lease Obligations (Details) - USD ($) $ in Thousands		Mar. 30, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Financing from French government agencies related to various government incentive programs (1)	[1]	$ 20,889	$ 20,565
Term loans		1,228	1,282
Obligations under capital leases		858	1,099
Total debt obligations		22,975	22,946
Less: current portion		(7,551)	(7,610)
Long-term portion		$ 15,424	$ 15,336

[1] As of March 30, 2018 and December 31, 2017, loans backed by French R&D tax credit receivables were $18.0 million and $17.7 million, respectively. As of March 30, 2018, the TVN French Subsidiary had an aggregate of $30.6 million of R&D tax credit receivables from the French government from 2018 through 2021. See Note 8, “Balance Sheet Components-Prepaid expenses and other current assets,” for more information. These tax loans have a fixed rate of 0.6%, plus EURIBOR 1 month + 1.3% and mature between 2018 through 2020. The remaining loans of $2.8 million at March 30, 2018, primarily relate to financial support from French government agencies for R&D innovation projects at minimal interest rates, and these loans mature between 2020 through 2025.