CONSOLIDATED STATEMENTS OF OPERATIONS & COMPREHENSIVE INCOME (LOSS) - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 28, 2025	Dec. 29, 2024	Dec. 31, 2023
Income Statement [Abstract]
Revenue from services	$ 1,615,997	$ 1,567,393	$ 1,906,243
Cost of services	1,248,155	1,161,000	1,400,184
Gross profit	367,842	406,393	506,059
Selling, general and administrative expense	371,087	410,870	494,603
Depreciation and amortization (inclusive of depreciation included in cost of services)	24,823	28,624	25,821
Goodwill and intangible asset impairment charge	200	59,674	9,485
Impairment, Long-Lived Asset, Held-for-Use	18,366	0	0
Loss from operations	(46,634)	(92,775)	(23,850)
Interest and other income (expense), net	1,003	4,251	3,205
Loss before tax expense (benefit)	(45,631)	(88,524)	(20,645)
Income tax expense (benefit)	2,329	37,224	(6,472)
Net loss	$ (47,960)	$ (125,748)	$ (14,173)
Net loss per common share:
Basic (in dollars per share)	$ (1.61)	$ (4.17)	$ (0.45)
Diluted (in dollars per share)	$ (1.61)	$ (4.17)	$ (0.45)
Weighted average shares outstanding:
Basic (in shares)	29,849	30,177	31,317
Diluted (in shares)	29,849	30,177	31,317
Other comprehensive income (loss):
Foreign currency translation adjustment	$ 546	$ (1,481)	$ (694)
Total other comprehensive income (loss), net of tax	546	(1,481)	(694)
Comprehensive loss	$ (47,414)	$ (127,229)	$ (14,867)