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Basis of Presentation and General Information (Carrying Amounts of Major Classes of Assets and Liabilities Presented in Discontinued Operations) (Details) - USD ($)
$ in Thousands
Dec. 28, 2018
Dec. 29, 2017
ASSETS    
Assets related to discontinued operations $ 137 $ 2,995
LIABILITIES    
Liabilities related to discontinued operations 2,300 329
European REL Working Capital group [Member]    
ASSETS    
Accounts receivable and unbilled revenue, net of allowance of $12 and $0 at December 28, 2018 and December 29, 2017, respectively 137 2,995
Assets related to discontinued operations 137 2,995
LIABILITIES    
Accrued expenses and other liabilities 2,300 329
Liabilities related to discontinued operations $ 2,300 $ 329