CONSOLIDATED STATEMENTS OF NET INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended
	Apr. 01, 2023	Apr. 02, 2022
Income Statement [Abstract]
Gross revenues	$ 184,317	$ 190,154
Direct costs:
Salaries and wages	48,384	45,977
Sub-consultant services	27,615	34,825
Other direct costs	12,320	15,525
Total direct costs	88,319	96,327
Gross profit	95,998	93,827
Operating expenses:
Salaries and wages, payroll taxes, and benefits	52,672	49,767
General and administrative	17,920	16,387
Facilities and facilities related	5,374	5,185
Depreciation and amortization	11,047	9,934
Total operating expenses	87,013	81,273
Income from operations	8,985	12,554
Interest expense	(1,581)	(914)
Income before income tax expense	7,404	11,640
Income tax expense	(1,457)	(2,998)
Net income and comprehensive income	$ 5,947	$ 8,642
Earnings per share:
Basic (in dollars per share)	$ 0.40	$ 0.59
Diluted (in dollars per share)	$ 0.39	$ 0.57
Weighted average common shares outstanding:
Basic (in shares)	14,883,487	14,693,323
Diluted (in shares)	15,383,437	15,216,105