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Other Assets (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 28, 2013
Dec. 29, 2012
Other Assets, Noncurrent [Abstract]    
Deposits $ 411 $ 376
Recycling contract, net 179 259
Debt issuance costs, net 278 279
Patent costs 21 21
Goodwill 38 38
Total 927 973
Amortization expense related to recycling contract 80 80
Non-cash interest expense related to debt issuance costs 131 197
Estimated amortization expense of recycling contract    
2014 80  
2015 80  
2016 $ 19