Employee Retirement Plans - Additional Information (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Jan. 03, 2015 plan	Dec. 28, 2013	Dec. 29, 2012
Defined Benefit Plan Disclosure [Line Items]
Number of defined contribution 401K savings plans	2
Defined Contribution Plan, Employer Discretionary Contribution Amount	$ 0.1	$ 0.1
Smithville Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to the pension plan	.8
Wrexham Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected contributions to the pension plan	.4
Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Contributions by employer to 401K savings plan		$ 0.1	$ 0.1