Basis of Presentation and General Information (Carrying Amount And Activity Of Goodwill) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Jan. 01, 2021
Carrying amount and activity of goodwill
Goodwill, Beginning Balance	$ 85,297	$ 84,578
Foreign currency translation adjustment	(227)	719
Goodwill, Ending Balance	85,070	85,297
Hackett Technology Solutions [Member]
Carrying amount and activity of goodwill
Goodwill, Beginning Balance	40,672	40,672
Goodwill, Ending Balance	40,672	40,672
The Hackett Group [Member]
Carrying amount and activity of goodwill
Goodwill, Beginning Balance	44,625	43,906
Foreign currency translation adjustment	(227)	719
Goodwill, Ending Balance	$ 44,398	$ 44,625