Income Taxes (Details) - USD ($) $ in Thousands	3 Months Ended	9 Months Ended
	Jan. 01, 2017	Oct. 01, 2017
Income Tax Disclosure [Abstract]
Effective Income Tax Rate Reconciliation, Percent		(6.70%)
Effective Income Tax Rate Reconciliation, Tax Credit, Other, Amount		$ 900
Valuation allowance increase (decrease)	$ (30,400)
Operating Loss Carryforwards		69,000
Unrecognized Tax Benefits	0	0
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 0	$ 0