Basis of Presentation and General Information (Summary of Disaggregation of Total Revenue) (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2023	Apr. 01, 2022
Disaggregation Of Revenue [Line Items]
Segment revenue	$ 71,229	$ 75,664
Global S&BT [Member]
Disaggregation Of Revenue [Line Items]
Segment revenue	42,335	42,637
Global S&BT [Member] | Consulting [Member] | North America [Member]
Disaggregation Of Revenue [Line Items]
Segment revenue	36,166	35,084
Global S&BT [Member] | Consulting [Member] | International [Member]
Disaggregation Of Revenue [Line Items]
Segment revenue	6,169	7,553
Oracle Solutions [Member]
Disaggregation Of Revenue [Line Items]
Segment revenue	17,168	21,512
Oracle Solutions [Member] | Consulting and Software Support and Maintenance [Member]
Disaggregation Of Revenue [Line Items]
Segment revenue	17,168	21,512
SAP Solutions [Member]
Disaggregation Of Revenue [Line Items]
Segment revenue	11,726	11,515
SAP Solutions [Member] | Consulting and Software Support and Maintenance [Member]
Disaggregation Of Revenue [Line Items]
Segment revenue	10,712	10,349
SAP Solutions [Member] | Software License Sales [Member]
Disaggregation Of Revenue [Line Items]
Segment revenue	$ 1,014	$ 1,166