Basis of Presentation and General Information (Summary of Disaggregation of Total Revenue Including Reimbursable Expenses (Details) - USD ($) $ in Thousands	3 Months Ended
Apr. 02, 2021	Mar. 27, 2020
Disaggregation Of Revenue [Line Items]
Revenue before reimbursements from continuing operations	$ 63,486	$ 69,533
Consulting [Member]
Disaggregation Of Revenue [Line Items]
Revenue before reimbursements from continuing operations	62,109	63,311
Software License Sales [Member]
Disaggregation Of Revenue [Line Items]
Revenue before reimbursements from continuing operations	1,301	1,875
Revenue Before Reimbursements [Member]
Disaggregation Of Revenue [Line Items]
Revenue before reimbursements from continuing operations	$ 63,410	$ 65,186

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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+ Details