Commitments and Contingencies (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Loss Contingencies [Line Items]
Settlement of class action litigation	[1]	$ 1,514	$ 0	$ 1,514	$ 0
The Water Works and Sewer Board of the City of Gadsden [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value				10
The Water Works and Sewer Board of the Town of Centre [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value				10
Carlos Garcia V. Fabric International [Member]
Loss Contingencies [Line Items]
Settlement of class action litigation				1,514
Danny and Pamela Atkins [Member]
Loss Contingencies [Line Items]
Loss Contingency, Damages Sought, Value				$ 50
Non-Employee Shareholder [Member]
Loss Contingencies [Line Items]
Number Of Shares Held By Litigant		50		50

[1] (1) See "Note 18 - Commitments and Contingencies" for further explanation.