CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jan. 01, 2022	Jan. 02, 2021	Dec. 28, 2019
Income Statement [Abstract]
Revenues	$ 565,933	$ 508,373	$ 451,370
Costs of services (exclusive of depreciation and amortization)	400,054	370,709	317,761
Selling, general and administrative expenses	97,372	90,028	93,613
Depreciation and amortization	12,768	12,840	10,648
Income from operations	55,739	34,796	29,348
Interest expense, net	(970)	(1,216)	(1,254)
Foreign currency gains (losses), net	(494)	42	(1,297)
Income before provision for income taxes	54,275	33,622	26,797
Provision for income taxes	12,596	9,115	6,050
Net income	$ 41,679	$ 24,507	$ 20,747
Net income per share:
Basic (in dollars per share)	$ 5.59	$ 3.14	$ 2.63
Diluted (in dollars per share)	$ 5.45	$ 3.07	$ 2.53
Weighted average number of shares outstanding:
Basic (in shares)	7,423	7,768	7,866
Diluted (in shares)	7,621	7,948	8,167