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Description of Business and Summary of Significant Accounting Policies (Details 3) - USD ($)
$ in Thousands
Dec. 31, 2015
May. 28, 2015
May. 29, 2014
Summary of Significant Accounting Policies [Line Items]      
Unrealized loss on available for sale investments $ (11) $ (11) $ (11)
Unrecognized gain (loss) on interest rate swap agreement 9 (17) 34
Net unrecognized actuarial loss for pension obligation (5,219) (5,284) (4,581)
Accumulated Other Comprehensive Income (Loss), Net of Tax $ (5,221) $ (5,312) $ (4,558)