SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024 USD ($)	Jun. 25, 2023 USD ($)	Jun. 30, 2024 USD ($) segment	Jun. 25, 2023 USD ($)
Segment Reporting [Abstract]
Number of aggregated reportable segments | segment			1
Segment Reporting Information [Line Items]
Revenue	$ 396,230	$ 475,588	$ 799,083	$ 940,876
Segment profit	7,219	19,225	9,791	28,818
Third-party processing fees for hiring tax credits	(90)	(110)	(180)	(230)
Amortization of software as a service assets	(1,452)	(952)	(2,795)	(1,820)
PeopleReady technology upgrade costs	(39)	(174)	(424)	(206)
Other benefits (costs)	(1,779)	(565)	(3,988)	(1,962)
Depreciation and amortization	(7,691)	(6,280)	(15,649)	(12,691)
Income (loss) from operations	(59,960)	(6,556)	(75,469)	(12,499)
Interest and other income (expense), net	1,741	578	3,340	1,592
Income (loss) before tax expense	(58,219)	(5,978)	(72,129)	(10,907)
Goodwill and intangible asset impairment charge	(59,674)	(9,485)	(59,674)	(9,485)
COVID-19 government subsidies, net	9,696	0	9,652	0
PeopleReady
Segment Reporting Information [Line Items]
Segment profit	394	8,158	(4,664)	9,030
PeopleManagement
Segment Reporting Information [Line Items]
Segment profit	3,395	2,250	6,146	2,048
PeopleScout
Segment Reporting Information [Line Items]
Segment profit	3,430	8,817	8,309	17,740
Corporate unallocated
Segment Reporting Information [Line Items]
Corporate unallocated expense	(6,150)	(8,215)	(12,202)	(14,923)
Contingent staffing | PeopleReady
Segment Reporting Information [Line Items]
Revenue	223,409	275,318	446,070	527,946
Contingent staffing | PeopleManagement
Segment Reporting Information [Line Items]
Revenue	131,751	140,560	265,611	283,744
Human resource outsourcing | PeopleScout
Segment Reporting Information [Line Items]
Revenue	$ 41,070	$ 59,710	$ 87,402	$ 129,186